CAT Fault Codes List: 499 to 54-5
Page 33 of 83 of the full CAT fault code list (8,286 codes). Each entry is the code as the machine reports it and what the manufacturer data says it means.
CAT codes 499 to 54-5
- 499Implement Variable Hydraulic Oil Pump Solenoid
- 50High System Voltage Warning
- 500800 1000 1200 1400 1700 2100 more information.
- 5000Generator overheating detected
- 5001Genset output voltage range issue
- 5007Generator duty cycle exceeded limit
- 501Cylinder #1 Spark Plug Maintenance Required
- 5019EGR outlet pressure abnormal
- 502Cylinder #2 Spark Plug Maintenance Required
- 503Cylinder #3 Spark Plug Maintenance Required
- 504Cylinder #4 Spark Plug Maintenance Required
- 505Cylinder #5 Spark Plug Maintenance Required
- 506Cylinder #6 Spark Plug Maintenance Required
- 507Cylinder #7 Spark Plug Maintenance Required
- 508Cylinder #8 Spark Plug Maintenance Required
- 509Cylinder #9 Spark Plug Maintenance Required
- 5099Engine oil pressure low warning
- 510Cylinder #10 Spark Plug Maintenance Required
- 5-11Cylinder #5 Injector current fault
- 512Cylinder #12 Spark Plug Maintenance Required
- 513Cylinder #13 Spark Plug Maintenance Required
- 514Cylinder #14 Spark Plug Maintenance Required
- 51-5Auxiliary Output #3 : Current Below Normal
- 51-6Auxiliary Output #3 : Current Above Normal
- 517Cylinder #17 Spark Plug Maintenance Required
- 518Engine requested torque limit exceeded
- 519Cylinder #19 Spark Plug Maintenance Required
- 5-2Engine Injector Cylinder #05 : Erratic, Intermittent, or Incorrect
- 520Cylinder #20 Spark Plug Maintenance Required
- 521Autolube Pressure Not Decreasing After Cycle
- 52-11Engine Air Shutoff Command Status
- 522Blade Angle Control Not In Neutral At Inappropriate Time
- 523Unable to Determine Rotation Direction of Left Drive Motor
- 523536EGR response issue
- 523537EGR motor temperature sensor fault
- 523538Engine injector code issue
- 523539Fuel pump pressure fault
- 523540Fuel pump pressure fault
- 523541EGR lift sensor fault
- 523543Accelerator pedal position sensor fault
- 523544Engine start aid issue
- 523547CAN data link fault
- 523548CAN data link fault
- 523572EGR position sensor fault
- 523574EGR actuator coil low side driver fault
- 523575EGR actuator fault
- 523576EGR actuator temperature issue
- 523577EGR actuator temperature sensor fault
- 523578EGR actuator data link fault
- 523580Intake throttle issue
- 523582Intake throttle lift sensor fault
- 523589Coolant temperature during regeneration issue
- 523590Stationary regeneration duration issue
- 523591CAN data link fault
- 523592CAN data link fault
- 523593CAN data link fault
- 523594CAN data link fault
- 523595CAN data link fault
- 523596CAN data link fault
- 523598CAN data link fault
- 523599Exhaust gas temperature sensors failure
- 523600Fuel pump calibration not completed
- 523601Exhaust gas temperature issue
- 523602Aftertreatment regeneration frequency issue
- 523603Engine coolant temperature issue
- 523604CAN data link fault
- 523700EEPROM checksum issue
- 524Unable to Determine Rotation Direction of Right Drive Motor
- 52-5Auxiliary Output #4 : Current Below Normal
- 52-6Auxiliary Output #4 : Current Above Normal
- 527High Brake Pump Command
- 5272Unexpected engine shutdown detected
- 528Service Brake Accumulator Pressure Not Responding
- 529Operator High Engine Coolant Temperature
- 5298Reduced DOC Efficiency – De-Rate
- 53ECM Fault
- 530Engine Oil Evacuation Occurred
- 531Low Transmission Oil Level
- 5319DPF incomplete Regeneration
- 532Service Brake Abuse While Gear Too High
- 533Service Brake Abuse Due to Torque Converter Pedal Misuse
- 534Swing Movement Detected With No Command Given
- 53-5Auxiliary Output #5 : Current Below Normal
- 5357Fuel injection quantity error detected
- 53-6Auxiliary Output #5 : Current Above Normal
- 537Engine requested torque control range low limit
- 538Engine requested torque control range high limit
- 539105 16 n/a Inlet Manifold Air Temp Sensor temperature - DERATE
- 5392DEF dosing unit loss of prime
- 5395Engine idle fuel quantity too high
- 54Fault code 54 detected.
- 540Low Engine Oil Refill Tank Level
- 5404PTO shutdown has stopped engine
- 54-05Auxiliary Output #06 current low attempting to operate the injector:
- 54-06Auxiliary Output #06 current high
- 541Differential (Axle) Oil Pressure Sensor
- 542Engine Oil Pressure Sensor - before oil filter
- 543Engine Oil Pressure Sensor - after oil filter
- 544Blade Left Lift Lever Out Of Neutral At Inappropriate Time
- 54-5Auxiliary I/O #06 : Current Below Normal
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.