CAT Engine Fault Codes List: 2497-3 to 3110-12
Page 3 of 12 of the full CAT Engine fault code list (1,341 codes). Each entry is the code as the machine reports it and what the manufacturer data says it means.
CAT Engine codes 2497-3 to 3110-12
- 2497-3ARD Fuel Pressure #2 Sensor : Voltage Above Normal
- 2497-4ARD Fuel Pressure #2 Sensor : Voltage Below Normal
- 2526-3Air Inlet Temperature Sensor : Voltage Above Normal
- 2526-4Air Inlet Temperature Sensor : Voltage Below Normal
- 253-11Personality Module : Other Failure Mode
- 261-3Engine Timing Calibration Required
- 2614-5Cylinder #7 Injector Actuator #2 : Current Below Normal
- 2614-6Cylinder #7 Injector Actuator #2 : Current Above Normal
- 2616-5Cylinder #8 Injector Actuator #2 : Current Below Normal
- 2616-6Cylinder #8 Injector Actuator #2 : Current Above Normal
- 2618-5Cylinder #9 Injector Actuator #2 : Current Below Normal
- 2618-6Cylinder #9 Injector Actuator #2 : Current Above Normal
- 2620-5Cylinder #10 Injector Actuator #2 : Current Below Normal
- 2620-6Cylinder #10 Injector Actuator #2 : Current Above Normal
- 262-13Volt Sensor DC Power Supply Short to +batt
- 2622-5Cylinder #11 Injector Actuator #2 : Current Below Normal
- 2622-6Cylinder #11 Injector Actuator #2 : Current Above Normal
- 2624-5Cylinder #12 Injector Actuator #2 : Current Below Norma
- 2624-6Cylinder #12 Injector Actuator #2 : Current Above Normal
- 264-13Decel Throttle Position calibration required
- 265-2User Defined Shutdown Input data erratic
- 266-2Incorrect Crank-Without-Inject Inputs
- 266-3Crank Without Injection Input voltage above normal
- 266-4Crank Without Injection Input voltage below normal
- 269-3Sensor Power Supply : Voltage Above Normal
- 269-4Sensor Power Supply : Voltage Above Normal
- 2710-11Engine Tertiary Speed Sensor : Other Failure Mode
- 2710-8Engine Tertiary Speed Sensor : Abnormal Frequency, Pulse Width, or Period
- 273-0Turbo Outlet Pressure Above Normal
- 2734-2Compression Brake Switch : Erratic, Intermittent, or Incorrect
- 2734-3Compression Brake Switch : Voltage Above Normal
- 2734-4Compression Brake Switch : Voltage Below Normal
- 2739-3Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Above Normal
- 2739-4Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Below Normal
- 2740-3Turbocharger #3 Compressor Inlet Pressure Sensor : Voltage Above Normal
- 2740-4Turbocharger #3 Compressor Inlet Pressure Sensor : Voltage Below Normal
- 2741-4Turbocharger #4 Compressor Inlet Pressure Sensor : Voltage Below Normal
- 274-21Atmospheric Pressure Sensor : Calibration Required
- 276-13Left Turbo Inlet Pressure calibration required
- 276-3Left Turbocharger Inlet Pressure Sensor : Voltage Above Normal
- 276-4Left Turbocharger Inlet Pressure Sensor : Voltage Below Normal
- 2766-2Intermediate Engine Speed Switch erratic, intermittent, or incorrect
- 2770-04Throttle Lock Resume/Decel Switch Voltage Below Normal
- 2771-03Throttle Lock Set/Accel Switch Voltage Above Normal
- 277-8Timing Calibration Signal Abnormal
- 279-3Aftercooler Temperature open/short to +batt
- 279-4Aftercooler Temperature short to ground
- 28Check Throttle Position Sensor Adjustment
- 281-5Check Engine Lamp Open/Short to Batt+
- 281-6Engine Lamp Circuit Short to Ground
- 282-5Engine Overspeed Lamp Open/Short to Batt+
- 282-6Engine Overspeed Lamp Short to Ground
- 284-5EMS System Enable open/short to ground
- 284-6EMS System Enable short to +batt
- 2854-9Coolant Temperature Control Module : Abnormal Update Rate
- 285-5EMS Coolant Lamp open/short to ground
- 285-6EMS Coolant Lamp short to +batt
- 286-5EMS Oil Lamp Open/Short to Ground
- 286-6EMS Oil Lamp Short to +Batt
- 289-13Fuel Pressure Sensor - Before Fuel Filter : Calibration Required
- 289-2Fuel Pressure Sensor - Before Fuel Filter erratic, intermittent, or incorrect
- 289-21Fuel Pressure Sensor - Before Fuel Filter : Data Drifted Low
- 289-3Fuel Pressure Sensor - Before Fuel Filter : Voltage Above Normal
- 289-4Fuel Pressure Sensor - Before Fuel Filter : Voltage Below Normal
- 289-9Fuel Pressure Sensor - Before Fuel Filter Abnormal Update Rate
- 2901-0ECU Part Number : High - Most Severe (3)
- 2901-3ECU Part Number : Voltage Above Normal
- 2901-4ECU Part Number : Voltage Below Normal
- 290-3Engine Fan Pump Pressure open/short to +batt
- 290-4Engine Fan Pump Pressure short to ground
- 291-11Engine Cooling Fan Solenoid open/short
- 296-12See Service Manual
- 296-14Transmission Control : Special Instruction
- 297-9Unable to Communicate with All-Wheel Drive ECM
- 298-2Service Brake Pedal Switch : Erratic, Intermittent, or Incorrect
- 298-3Service Brake Pedal Switch : Voltage Above Normal
- 298-4Service Brake Pedal Switch : Voltage Below Normal
- 3002-11Engine Exhaust NOx Level Sensor : Other Failure Mode
- 3002-12Engine Exhaust NOx Level Sensor : Failure
- 3002-5Engine Exhaust NOx Level Sensor : Current Below Normal
- 3002-6Engine Exhaust NOx Level Sensor : Current Above Normal
- 3031-10Intake Manifold #2 Pressure Sensor : Abnormal Rate of Change
- 3031-13Intake Manifold #2 Pressure Sensor: Calibration Required
- 3031-21Intake Manifold #2 Pressure Sensor: Data Drifted Low
- 3031-3Intake Manifold #2 Pressure Sensor : Voltage Above Normal
- 3031-4Intake Manifold #2 Pressure Sensor : Voltage Below Normal
- 3050-14Drivetrain Control : Special Instruction
- 3050-9Drivetrain Control : Abnormal Update Rate
- 3090-21Aftertreatment #1 DEF #1 Pressure (absolute) : Data Drifted Low
- 3090-3Aftertreatment #1 SCR Dosing Reagent Pressure Sensor : Voltage Above Normal
- 3090-4Aftertreatment #1 SCR Dosing Reagent Pressure Sensor : Voltage Below Normal
- 3090-7Aftertreatment #1 SCR Dosing Reagent Pressure Sensor : Not Responding Properly
- 3096-2Aftertreatment #1 DEF Temperature #1 Sensor : Erratic, Intermittent, or Incorrect
- 3096-8Aftertreatment #1 SCR Dosing Reagent Temperature #1 Sensor : Abnormal Frequency, Pulse Width, or Period
- 3100-12Aftertreatment #1 SCR Catalyst Tank Reagent Quality Sensor : Failure
- 3105-20Aftertreatment #1 SCR Catalyst Intake Gas Temperature : Data Drifted High
- 3105-3Aftertreatment #1 SCR Catalyst Intake Gas Temperature Sensor : Voltage Above Normal
- 3105-4Aftertreatment #1 SCR Catalyst Intake Gas Temperature Sensor : Voltage Below Normal
- 3105-8Aftertreatment #1 SCR Catalyst Intake Gas Temperature Sensor : Abnormal Frequency, Pulse Width, or Period
- 3110-12Aftertreatment #1 DEF Line Heater #1 : Failure
Other Caterpillar machine types
Fault code lists by brand
- Volvo6,508 codes
- New Holland Tractor3,475 codes
- FPT3,033 codes
- Case IH2,992 codes
- Bobcat2,653 codes
- Challenger Tractor2,434 codes
- New Holland Combine2,274 codes
- John Deere Tractors1,884 codes
- Case Wheel Loader1,859 codes
- John Deere Engines1,853 codes
- Cummins1,847 codes
- Challenger Rubber Track Tractor1,747 codes
- Volvo Wheel Loader1,726 codes
- Deutz1,684 codes
Safety-critical: confirm before use
Safety first: park on level ground, stop the engine, and secure the machine before any inspection. Thresholds, component locations, wire numbers, fuse locations, and reset procedures can vary by model, configuration, and serial number. Confirm them in the service documentation for your exact machine.