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Every Caterpillar engine fault code in our verified reference — 547 codes, 519 of them with a documented remedy. Find your code in the table, read the likely causes, then work the remedy. If it is beyond a field fix, our workshop in Embakasi repairs Caterpillar controllers and engines at board level.
Covers: 3500 Series · C12 · C13/C15/C18 · C15 · C18 · C7 · C9 · EMCP 3 Series · EMCP II Series · EMR3 · TCD 3.6 L4
| Code | Fault | Likely cause | Remedy |
|---|---|---|---|
| 11 | Air filter condition Pressure loss above target range with system reaction | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; if above 14.8V (for 12V systems) | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off; Measure battery voltage; check the charging alternator or external charger for overcharging. Inspect the voltage regulator for faults. Check battery cables for shorts to power. Replace the battery if damaged. Press the reset button after addressing the issue. to the APM403 or a technician if unresolved. |
| 12 | Accelerator pedal Cable break or short circuit | signal implausible compared to signal of idle sensor (analog pedal); Reduce the electrical load by disconnecting non-essential appliances. Inspect alternator output cables for shorts or damage. Test the alternator for internal faults (e.g.; shorted windings). Verify load connections for faulty appliances. Press the reset button after addressing the issue. Consult the APM403 or a technician if unresolved. | — |
| 14 | Accelerator pedal Cable break or short circuit | bad PWM signal range or frequency (digital pedal) | Check the coolant level; top up if low. Inspect the cooling system for leaks or blockages. Test the coolant pressure sensor and wiring for faults; replace if defective. Verify the coolant pump operation. Press the reset button after addressing the issue. to the APM403 or a technician if unresolved. |
| 15 | Accelerator pedal Bad PWM pulse-width repetition rate (digital pedal) | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; 1500 RPM for 50 Hz). Inspect the fuel system for over-fueling. Test the frequency sensor and wiring | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off; Verify the engine speed; adjust the governor to maintain nominal RPM (e.g.; replace if faulty. Press the reset button after addressing the issue. Consult the APM403 or a technician if unresolved. |
| 16 | ECU internal error Ambient pressure sensor defective | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; ensure it meets nominal RPM (e.g.; 1500 RPM for 50 Hz). Inspect the fuel system for restrictions or air. Verify the governor operation. Test the frequency sensor and wiring | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off; Check the engine speed; replace if faulty. Press the reset button after addressing the issue. to the APM403 or a technician if unresolved. |
| 17 | Air heater relay Cable break or short circuit | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off; Check the fuel system for proper delivery; inspect injectors and fuel filters. Verify the spark plugs (if applicable) or injectors for faults; replace if needed. Inspect the air intake system for restrictions. Press the reset button after addressing the issue. Consult the APM403 or a technician if unresolved. |
| 18 | Air heater magnetic valve Cable break or short circuit | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; providing incorrect readings. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off |
| 19 | Air heater relay Cable break or wrong connection | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; providing incorrect fuel level readings. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off |
| 20 | Air heater relay Inoperable during shut-off | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; providing incorrect pressure readings. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off |
| 22 | Battery Voltage below target range | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; affecting voltage monitoring. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off |
| 23 | Battery voltage Above target range with system reaction | waiting until the ECU has shut off and switching ignition on again. Check if the error is still active.; affecting speed monitoring. | Check the cabling for a short circuit/cable break; repair/replace cables if necessary. Check the particular component for damage or the need of maintenance; repair/replace it if necessary. Reset the ECU by switching ignition off |
| 29-3 | Handthrottle; signal out of range | short circuit to battery; providing incorrect level readings. | — |
| 29-4 | Handthrottle; signal out of range | short circuit to ground; affecting temperature monitoring. | — |
| 51-3 | Actuator error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1 | 7.8); internal error; affecting fuel delivery. | — |
| 51-4 | Actuator error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1 | 7.8); internal error; preventing engine cranking. | — |
| 51-5 | Actuator error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1 | 7.8); internal error; battery or auxiliary supply); ensure proper voltage (e.g.; 12V or 24V). Inspect power supply wiring for shorts; opens; or damage. Test the battery or power module | Check the control panel power source (e.g.; replace if faulty. Reset the fault on the MICS Telys panel. to the SDMO MICS Telys or a technician if unresolved. |
| 51-6 | Actuator error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1 | 7.8); internal error; glow plug relay for diesel engines) is malfunctioning | — |
| 51-7 | Actuator error EGR-Valve (2.9;3.6) or Throttle-Valve (6.1 | 7.8); internal error; preventing proper starting and triggering a shutdown. | — |
| 101-3 | Engine Crankcase Pressure: Voltage Above Normal | damaged windings). Reduce the electrical load if excessive. Reset the fault and restart. Consult the APM303 or a technician if unresolved. | Check sensor wiring for shorts. Inspect crankcase pressure sensor. Replace if faulty.; Inspect the alternator voltage regulator for faults causing overvoltage. Check alternator output cables for shorts to power. Test the alternator for internal faults (e.g. |
| 101-4 | Engine Crankcase Pressure: Voltage Below Normal | Reduce the electrical load if exceeding the generator’s capacity. Inspect alternator output cables for loose or damaged connections. Test the alternator voltage regulator and excitation circuit | Check for open circuits. Inspect sensor. Replace if necessary.; repair or replace if faulty. Check the alternator belt for slip. Reset the fault and restart. to the APM303 or a technician if unresolved. |
| 101-13 | Engine Crankcase Pressure: Calibration Required | Perform calibration of crankcase pressure sensor as per manufacturer procedure.; 1500 RPM for 50 Hz). Inspect the governor or throttle for faults. Check the fuel system for over-fueling. Test the frequency sensor and wiring | Verify the engine speed does not exceed nominal RPM (e.g.; replace if faulty. Reset the fault and restart. Consult the APM303 or a technician if unresolved. |
| 108-3 | Barometric Pressure: Voltage Above Normal | ensure it meets nominal RPM (e.g.; 1500 RPM for 50 Hz). Inspect the fuel system for restrictions or air. Verify the governor or throttle operation. Test the frequency sensor and wiring | Check sensor wiring for shorts. Inspect atmospheric pressure sensor. Replace if faulty.; Check the engine speed; replace if faulty. Reduce the load if excessive. Reset the fault and restart. to the APM303 or a technician if unresolved. |
| 108-4 | Barometric Pressure: Voltage Below Normal | Immediately disconnect non-essential loads. Inspect alternator output cables for shorts or damage. Test the alternator for internal short circuits (e.g.; damaged windings). Verify load connections for faulty appliances. Reset the fault and restart. Consult the APM303 or a technician if unresolved. | Check for open circuits. Inspect sensor. Replace if necessary. |
| 108-21 | Barometric Pressure: Calibration Required | Perform calibration of atmospheric pressure sensor as per manufacturer procedure.; triggering a warning or shutdown. | — |
| 109-3 | Engine Coolant Pressure: Voltage Above Normal | charge if below 12.4V or replace if faulty. Inspect battery cables for corrosion or loose connections | Check sensor wiring for shorts. Inspect coolant pressure sensor. Replace if faulty.; Measure battery voltage; clean or tighten. Test the charging alternator for proper output (13.5–14.5V for 12V systems); repair or replace if faulty. Reset the fault and restart. to the APM303 or a technician if unresolved. |
| 109-4 | Engine Coolant Pressure: Voltage Below Normal | triggering a shutdown. | Check for open circuits. Inspect sensor. Replace if necessary. |
| 110-3 | Engine Coolant Temperature: Voltage Above Normal | indicating a potential electrical issue. | Check sensor wiring for shorts. Inspect coolant temperature sensor. Replace if faulty. |
| 110-4 | Engine Coolant Temperature: Voltage Below Normal | triggering a shutdown. | Check for open circuits. Inspect sensor. Replace if necessary. |
| 157-3 | Engine Injector Metering Rail #1 Pressure: Voltage Above Normal | triggering a warning. | Check sensor wiring for shorts. Inspect fuel rail pressure sensor. Replace if faulty. |
| 157-4 | Engine Injector Metering Rail #1 Pressure: Voltage Below Normal | preventing fuel delivery and triggering a shutdown. | Check for open circuits. Inspect sensor. Replace if necessary. |
| 168-3 | Battery Potential / Power | Not provided in source. Consult Caterpillar for troubleshooting.; reducing engine performance. | — |
| 190 | Emergency Stop Active - Status | Ensure Emergency Stop input is wired correctly. Check grounding. Verify active state (High/Low). Reset event if needed. Use Caterpillar Service Tool or display menu.; causing engine performance issues and triggering a shutdown. | — |
| AL1 | Alarm Fault 1 (e.g. | Low Oil Pressure Alarm) | Check for proper ventilation around the alternator. Inspect for blocked vents or debris. Test the alternator temperature sensor and wiring for faults; replace if defective. Reduce the electrical load if excessive. Reset the fault and restart. to the APM303 or a technician if unresolved. |
| AL2 | Alarm Fault 2 (e.g. | Low Coolant Temperature Alarm); worn pump). Press the reset button after addressing the issue. Consult the APM403 or a technician if unresolved. | Check the engine oil level; top up with the recommended oil if low. Inspect for oil leaks in the engine or lines. Test the oil pressure sensor and wiring for faults; replace if defective. Perform an oil pressure test to check for internal engine issues (e.g. |
| AL3 | Alarm Fault 3 (Custom or High Coolant Level Alarm) | 1500 RPM for 50 Hz). Inspect the governor or throttle for miscalibration or faults. Check the fuel system for over-fueling issues (e.g.; stuck injector). Test the speed sensor | Check coolant level or custom condition. Inspect sensor and wiring.; Verify the engine speed is within nominal limits (e.g.; replace if faulty. Press the reset button after addressing the issue. to the APM403 or a technician if unresolved. |
| AL4 | Alarm Fault 4 (Custom Alarm) | restrictions; or air locks. Replace the fuel filter if clogged. Test the fuel pump for proper operation | Check custom programmed condition. Inspect related devices and wiring.; Inspect the fuel system for leaks; replace if faulty. Verify the fuel pressure sensor and wiring; replace if defective. Prime the system if needed. Press the reset button after addressing the issue. Consult the APM403 or a technician if unresolved. |
| E3001 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3002 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3003 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3004 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3005 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3006 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3007 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3008 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3009 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3010 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3011 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3012 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3013 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3014 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3015 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3016 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3017 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3018 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3019 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3020 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3021 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3022 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3023 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3024 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3025 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3026 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3027 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3028 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3029 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3030 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3031 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3032 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3033 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3034 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3035 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3036 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3037 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3038 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3039 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3040 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3041 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3042 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3043 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3044 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3045 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3046 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3047 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3048 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3049 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3050 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3051 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3052 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3053 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3054 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3055 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3056 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3057 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3058 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3059 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3060 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3061 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3062 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3063 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3064 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3065 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3066 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3067 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3068 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3069 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3070 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3071 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3072 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3073 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3074 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3075 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3076 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3077 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3078 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3079 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3080 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3081 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3082 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3083 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3084 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3085 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3086 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3087 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3088 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3089 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3090 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3091 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3092 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3093 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3094 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3095 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3096 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3097 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3098 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3099 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3100 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3101 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3102 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3103 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3104 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3105 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3106 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3107 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3108 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3109 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3110 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3111 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3112 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3113 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3114 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3115 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3116 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3117 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3118 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3119 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3120 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3121 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3122 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3123 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3124 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3125 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3126 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3127 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3128 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3129 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3130 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3131 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3132 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3133 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3134 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3135 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3136 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3137 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3138 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3139 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3140 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3141 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3142 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3143 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3144 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3145 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3146 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3147 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3148 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3149 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3150 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3151 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3152 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3153 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3154 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3155 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3156 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3157 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3158 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3159 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3160 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3161 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3162 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3163 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3164 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3165 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3166 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3167 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3168 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3169 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3170 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3171 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3172 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3173 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3174 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3175 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3176 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3177 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3178 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3179 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3180 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3181 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3182 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3183 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3184 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3185 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3186 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3187 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3188 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3189 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3190 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3191 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3192 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3193 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3194 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3195 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3196 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3197 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3198 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3199 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3200 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3201 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3202 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3203 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3204 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3205 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3206 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3207 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3208 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3209 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3210 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3211 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3212 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3213 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3214 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3215 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3216 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3217 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3218 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3219 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3220 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3221 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3222 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3223 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3224 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3225 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3226 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3227 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3228 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3229 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3230 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3231 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3232 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3233 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3234 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3235 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3236 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3237 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3238 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3239 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3240 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3241 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3242 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3243 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3244 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3245 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3246 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3247 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3248 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3249 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3250 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3251 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3252 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3253 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3254 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3255 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3256 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3257 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3258 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3259 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3260 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3261 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3262 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3263 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3264 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3265 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3266 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3267 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3268 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3269 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3270 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3271 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3272 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3273 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3274 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3275 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3276 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3277 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3278 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3279 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3280 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3281 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3282 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3283 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3284 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3285 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3286 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3287 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3288 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3289 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3290 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3291 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3292 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3293 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3294 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3295 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3296 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3297 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3298 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3299 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3300 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3301 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3302 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3303 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3304 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3305 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3306 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3307 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3308 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3309 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3310 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3311 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3312 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3313 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3314 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3315 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3316 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3317 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3318 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3319 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3320 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3321 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3322 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3323 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3324 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3325 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3326 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3327 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3328 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3329 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3330 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3331 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3332 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3333 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3334 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3335 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3336 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3337 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3338 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3339 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3340 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3341 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3342 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3343 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3344 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3345 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3346 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3347 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3348 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3349 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3350 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3351 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3352 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3353 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3354 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3355 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3356 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3357 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3358 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3359 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3360 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3361 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3362 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3363 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3364 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3365 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3366 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3367 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3368 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3369 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3370 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3371 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3372 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3373 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3374 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3375 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3376 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3377 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3378 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3379 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3380 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3381 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3382 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3383 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3384 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3385 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3386 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3387 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3388 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3389 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3390 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3391 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3392 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3393 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3394 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3395 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3396 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3397 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3398 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3399 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3400 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3401 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3402 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3403 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3404 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3405 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3406 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3407 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3408 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3409 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3410 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3411 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3412 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3413 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3414 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3415 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3416 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3417 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3418 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3419 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3420 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3421 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3422 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3423 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3424 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3425 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3426 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3427 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3428 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3429 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3430 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3431 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3432 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3433 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3434 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3435 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3436 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3437 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3438 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3439 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3440 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3441 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3442 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3443 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3444 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3445 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3446 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3447 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3448 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3449 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3450 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3451 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3452 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3453 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3454 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3455 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3456 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3457 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3458 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3459 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3460 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3461 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3462 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3463 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3464 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3465 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3466 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3467 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3468 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3469 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3470 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3471 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3472 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3473 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| E3474 | Engine Underspeed | Low fuel delivery; clogged filters | Replace filters; test fuel delivery |
| E3475 | Low Fuel Rail Pressure | Clogged filter; weak transfer pump; air in lines | Replace filter; test pump; bleed fuel system |
| E3476 | High Fuel Rail Pressure | Injector leak; pressure relief valve stuck | Inspect injectors; replace relief valve; recalibrate ECM |
| E3477 | Fuel Temperature High | Return fuel overheated; cooling failure | Check fuel cooler; replace lines; verify cooling circuit |
| E3478 | Fuel Injector Fault | Open/short circuit; injector internal failure | Replace faulty injector; check harness; test ECM driver |
| E3479 | Coolant Temperature High | Low coolant; blocked radiator; water pump failure; Top coolant | flush radiator; test/replace pump |
| E3480 | Coolant Temperature Low | Thermostat stuck open; sensor fault | Replace thermostat; test sensor |
| E3481 | Coolant Level Low | Leak in hoses or radiator; expansion tank issue; pressure test | Inspect hoses; repair leak |
| E3482 | Oil Pressure Low | Oil leak; worn oil pump; low oil level; Top oil | test/replace oil pump; inspect for leaks |
| E3483 | Oil Pressure High | Blocked oil passage; faulty pressure regulator | Flush oil galleries; replace regulator |
| E3484 | Oil Temperature High | Blocked oil cooler; low oil level; top oil | Clean/replace oil cooler |
| E3485 | Turbo Boost Low | Air hose leak; turbo wear; actuator fault | Replace hose; service turbo; calibrate actuator |
| E3486 | Turbo Overspeed | ECM miscalibration; faulty actuator | Update ECM software; reset actuator |
| E3487 | Air Filter Restriction | Clogged air filter | Replace air filter; inspect intake |
| E3488 | Crankshaft Position Sensor Fault | Sensor damaged; wiring short | Replace sensor; check wiring harness |
| E3489 | Camshaft Position Sensor Fault | Loose timing; failed sensor | Reset timing; replace sensor |
| E3490 | Manifold Pressure Sensor Fault | Short circuit; contamination | Clean/replace sensor; test wiring |
| E3491 | Exhaust Temperature High | Over-fueling; blocked DPF; restricted exhaust | Check injectors; clean/replace DPF; inspect exhaust |
| E3492 | EGR Valve Fault | Carbon buildup; valve stuck | Clean or replace EGR valve |
| E3493 | DPF High Soot Load | Failed regeneration; excessive idling; Perform forced regen | check sensors |
| E3494 | Alternator Under Voltage | Loose belt; alternator fault | Tighten belt; replace alternator |
| E3495 | Alternator Over Voltage | Faulty regulator | Replace regulator/alternator |
| E3496 | ECM Power Supply Fault | Loose battery cables; blown fuse | Tighten cables; replace fuse |
| E3497 | ECM Internal Memory Error | Corrupted ECM software; Reflash ECM with OEM tool | — |
| E3498 | CAN Communication Loss - ECM to Panel | Broken CAN wiring; ECM fault | Inspect wiring; test ECM |
| E3499 | CAN Communication Loss - ECM to Governor | Governor module failure | Replace governor; test wiring |
| E3500 | Engine Overspeed Shutdown | Fuel rack stuck; governor failure | Inspect governor; recalibrate fuel system |
| Fuel Filter Differential Pressure - High Shutdown | Fuel Filter Differential Pressure - High Shutdown | triggering a warning. | Check sensor operation. Replace/clean fuel filter if necessary. Adjust threshold using Caterpillar Service Tool. Verify wiring. |
| Fuel Filter Differential Pressure - High Warning | Fuel Filter Differential Pressure - High Warning | Ensure proper ventilation around the control panel. Check for blocked vents or excessive ambient heat. Inspect the control panel cooling fan (if equipped) and wiring | Check sensor operation. Replace/clean fuel filter if necessary. Adjust threshold using Caterpillar Service Tool. Verify wiring.; replace if faulty. Reset the alarm. to the SDMO TELYS1 or a technician if the issue persists. |
| Fuel Filter Differential Pressure - Low Shutdown | Fuel Filter Differential Pressure - Low Shutdown | triggering a shutdown. | Check sensor operation. Adjust threshold using Caterpillar Service Tool. Verify wiring. |
| Fuel Filter Differential Pressure - Low Warning | Fuel Filter Differential Pressure - Low Warning | triggering a shutdown. | Check sensor operation. Adjust threshold using Caterpillar Service Tool. Verify wiring. |
| SP1 | Spare Fault 1 (Customizable input fault) | hoses; radiator; pump). Test the coolant level sensor and wiring for faults (e.g.; shorts | Check the programmed spare input conditions. Inspect wiring and connected devices. Reset and troubleshoot based on customer configuration.; Check the coolant level in the radiator or reservoir; top up with the recommended coolant type. Inspect the cooling system for leaks (e.g. |
| SP2 | Spare Fault 2 (Customizable input fault) | shorts; opens) | Check the programmed spare input conditions. Inspect wiring and connected devices. Reset and troubleshoot based on customer configuration.; Check the oil level; top up with the recommended oil if low. Inspect the oil cooling system for blockages or pump failure. Test the oil temperature sensor and wiring for faults (e.g.; replace if defective. Ensure proper engine ventilation. Reset the fault and restart. to the APM303 or a technician if unresolved. |
| SP3 | Spare Fault 3 (Customizable input fault) | — | Check the programmed spare input conditions. Inspect wiring and connected devices. Reset and troubleshoot based on customer configuration.; Check the fuel system for leaks or restrictions. Inspect the fuel filter; replace if clogged. Test the fuel pump for proper operation; replace if faulty. Verify the fuel pressure sensor and wiring; replace if defective. Prime the fuel system if needed. Reset the fault and restart. Consult the APM303 or a technician if unresolved. |
| Starting Air Pressure - High Shutdown | Starting Air Pressure - High Shutdown | blocked muffler). Inspect the cooling system to ensure proper engine cooling. Test the exhaust temperature sensor and wiring for faults (e.g.; shorts; opens) | Check sensor operation. Ensure within threshold. Adjust using Caterpillar Service Tool. Verify wiring.; Check the exhaust system for restrictions (e.g.; replace if defective. Reduce the load if excessive. Reset the alarm. to the SDMO TELYS1 or a technician if unresolved. |
| Starting Air Pressure - High Warning | Starting Air Pressure - High Warning | triggering a warning. | Check sensor operation. Ensure within warning threshold. Adjust using Caterpillar Service Tool. Verify wiring. |
| Starting Air Pressure - Low Shutdown | Starting Air Pressure - Low Shutdown | triggering a shutdown. | Check sensor operation. Ensure within threshold. Adjust using Caterpillar Service Tool. Verify wiring. |
| Starting Air Pressure - Low Warning | Starting Air Pressure - Low Warning | triggering a shutdown. | Check sensor operation. Ensure within warning threshold. Adjust using Caterpillar Service Tool. Verify wiring. |
Codes and descriptions are industry-standard identifiers reproduced for identification only. This reference is not affiliated with or endorsed by Caterpillar; for official procedures always refer to the manufacturer’s service manual for your specific engine. A dash means our registry holds no verified entry for that column — we publish the gap rather than fill it in.
Send us the code and the engine serial. We diagnose Caterpillar sets on site across all 47 counties, and repair controllers at board level on the bench in Embakasi.