CAT Engine Fault Codes List: 1850-4 to 2496-7
Page 2 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 1850-4 to 2496-7
- 1850-4Tandem Engine Coupling Oil Pressure Sensor Low/Short Circuit
- 18-6Engine Fuel Injection Pump Fuel Control Valve : Current Above Normal
- 18-8Fuel Control Valve : Abnormal Frequency, Pulse Width, or Period
- 1884-2Ignition Key Switch Loss of Signal
- 18-9Fuel Control Valve : Abnormal Update Rate
- 1901-5Intake Valve Actuator #1 : Current Below Normal
- 1901-6Intake Valve Actuator #1 : Current Above Normal
- 1901-7Intake Valve Actuator #1 : Not Responding Properly
- 1902-5Intake Valve Actuator #2 : Current Below Normal
- 1902-6Intake Valve Actuator #2 : Current Above Normal
- 1902-7Intake Valve Actuator #2 : Not Responding Properly
- 1903-5Intake Valve Actuator #3 : Current Below Normal
- 1903-6Intake Valve Actuator #3 : Current Above Normal
- 1903-7Intake Valve Actuator #3 : Not Responding Properly
- 1904-5Intake Valve Actuator #4 : Current Below Normal
- 1904-6Intake Valve Actuator #4 : Current Above Normal
- 1904-7Intake Valve Actuator #4 : Not Responding Properly
- 1905-5Intake Valve Actuator #5 : Current Below Normal
- 1905-6Intake Valve Actuator #5 : Current Above Normal
- 1905-7Intake Valve Actuator #5 : Not Responding Properly
- 1906-5Intake Valve Actuator #6 : Current Below Normal
- 1906-6Intake Valve Actuator #6 : Current Above Normal
- 1906-7Intake Valve Actuator #6 : Not Responding Properly
- 190-7Engine Speed Sensor not Responsing Properly
- 1922-5Intake Valve Actuation System Oil Pressure Solenoid : Current Below Normal
- 1922-6Intake Valve Actuation System Oil Pressure Solenoid : Current Above Normal
- 1922-7Intake Valve Actuation System Oil Pressure Solenoid : Not Responding Properly
- 1924-3Intake Valve Actuation System Oil Pressure Sensor : Voltage Above Normal
- 1924-4Intake Valve Actuation System Oil Pressure Sensor : Voltage Below Normal
- 1937-2Engine Coolant Flow Switch : Erratic, Intermittent, or Incorrect
- 1937-7Engine Coolant Flow Switch : Not Responding Properly
- 2123-35 Volt Sensor DC Power Supply #2 : Voltage Above Normal
- 2123-45 Volt Sensor DC Power Supply #2 : Voltage Below Normal
- 2180-1Aftertreatment 1 Diesel Oxidation Catalyst Conversion Efficiency : Low - least severe (1)
- 22-13Timing Sensor Calibration Required
- 2232-5Engine Retarder Solenoid : Current Below Normal
- 2232-6Engine Retarder Solenoid : Current Above Normal
- 2246-5Glow Plug Start Aid Relay : Current Below Normal
- 2247-2Fuel Transfer Pump Intake Pressure Sensor : Erratic, Intermittent, or Incorrect
- 2247-3Fuel Transfer Pump Inlet Pressure Sensor : Voltage Above Normal
- 2247-4Fuel Transfer Pump Inlet Pressure Sensor : Voltage Below Normal
- 2271-5Engine Oil Renewal System Actuation Solenoid : Current Below Normal
- 2271-6Engine Oil Renewal System Actuation Solenoid : Current Above Normal
- 2302-3Engine Coolant Pump Outlet Pressure Sensor : Voltage Above Normal
- 2302-4Engine Coolant Pump Outlet Pressure Sensor : Voltage Below Normal
- 2323-3Fuel Rail Temperature Sensor : Voltage Above Normal
- 2323-4Fuel Rail Temperature Sensor : Voltage Below Normal
- 2348-14SAE J1939 Data Link #2 : Special Instruction
- 2348-9SAE J1939 Data -Link #2 : Abnormal Update Rate
- 2349-19Engine Coolant Pump Outlet Temperature Sensor : Data Error
- 2350-3Left Exhaust #2 Temperature : Voltage Above Normal
- 2350-4Left Exhaust #2 Temperature : Voltage Below Normal
- 2350-8Left Exhaust #2 Temperature abnormal frequency, pulse width, or period
- 2351-3Right Exhaust #2 Temperature : Voltage Above Normal
- 2351-4Right Exhaust #2 Temperature : Voltage Below Normal
- 2351-8Right Exhaust #2 Temperature abnormal frequency, pulse width, or period
- 2354-3Engine Compression Brake Pedal Switch voltage above normal
- 2354-4Engine Compression Brake Pedal Switch voltage below normal
- 2452-3Aftertreatment #1 DPF Intake Gas Temperature : Voltage Above Normal
- 2452-4Aftertreatment #1 DPF Intake Gas Temperature : Voltage Below Normal
- 2452-8DPF #1 Intake Temperature Sensor : Abnormal Frequency, Pulse Width, or Period
- 2458-13DPF #1 Differential Pressure Sensor : Out of Calibration
- 2458-2DPF #1 Differential Pressure Sensor : Erratic, Intermittent, or Incorrect
- 2458-3DPF #1 Differential Pressure Sensor : Voltage Above Normal
- 2458-4DPF #1 Differential Pressure Sensor : Voltage Below Normal
- 2460-3ARD Fuel Pressure #1 Sensor : Voltage Above Normal
- 2460-4ARD Fuel Pressure #1 Sensor : Voltage Below Normal
- 246-14Proprietary CAN Data Link : Special Instruction
- 2461-5ARD Fuel Pressure #1 Control : Current Below Normal
- 2461-6ARD Fuel Pressure #1 Control : Current Above Normal
- 2465-5Aftertreatment #1 Ignition Transformer Primary : Current Below Normal
- 2465-6Aftertreatment #1 Ignition Transformer Primary : Current Above Normal
- 246-9Proprietary CAN Data Link : Abnormal Update Rate
- 247-12SAE J1939 Data Link Failure
- 247-14SAE J1939 Data Link : Special Instruction
- 248-12Cat Data Link failed
- 248-14CAT Data Link : Special Instruction
- 2489-13ARD Air Pressure Control Actuator : Out of Calibration
- 2489-5ARD Air Pressure Control Actuator : Current Below Normal
- 2489-6ARD Air Pressure Control Actuator : Current Above Normal
- 2489-7ARD Air Pressure Control Actuator : Not Responding Properly
- 2489-8ARD Air Pressure Control Actuator : Abnormal Frequency, Pulse Width, or Period
- 2490-3ARD Air Pressure Control Actuator Position Sensor : Voltage Above Normal
- 2490-4ARD Air Pressure Control Actuator Position Sensor : Voltage Below Normal
- 2493-2Cylinder #17 Injector : Erratic, Intermittent, or Incorrect
- 2493-5Cylinder #17 Injector : Current Below Normal
- 2493-6Cylinder #17 Injector : Current Above Normal
- 2493-7Cylinder #17 Injector : Not Responding Properly
- 2494-2Cylinder #18 Injector : Erratic, Intermittent, or Incorrect
- 2494-5Cylinder #18 Injector : Current Below Normal
- 2494-6Cylinder #18 Injector : Current Above Normal
- 2494-7Cylinder #18 Injector : Not Responding Properly
- 2495-2Cylinder #19 Injector : Erratic, Intermittent, or Incorrect
- 2495-5Cylinder #19 Injector : Current Below Normal
- 2495-6Cylinder #19 Injector : Current Above Normal
- 2495-7Cylinder #19 Injector : Not Responding Properly
- 2496-2Cylinder #20 Injector : Erratic, Intermittent, or Incorrect
- 2496-5Cylinder #20 Injector : Current Below Normal
- 2496-6Cylinder #20 Injector : Current Above Normal
- 2496-7Cylinder #20 Injector : Not Responding Properly
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.