CAT Engine Fault Codes List: SPN 4792 FMI 14 to SPN 654 FMI 6
Page 11 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 SPN 4792 FMI 14 to SPN 654 FMI 6
- SPN 4792 FMI 14Aftertreatment #1 SCR Monitoring System Malfunction
- SPN 5019 FMI 13Engine Exhaust Gas Recirculation Outlet Pressure : Calibration Required
- SPN 5019 FMI 21Engine Exhaust Gas Recirculation Outlet Pressure : Data Drifted Low
- SPN 5019 FMI 3Engine Exhaust Gas Recirculation Outlet Pressure : Voltage Above Normal
- SPN 5019 FMI 4Engine Exhaust Gas Recirculation Outlet Pressure : Voltage Below Normal
- SPN 5055 FMI 17Engine Oil Viscosity : Low - least severe (1)
- SPN 5055 FMI 18Engine Oil Viscosity : Low - moderate severity (2)
- SPN 5099 FMI 5Engine Oil Pressure Low Lamp Data - Current Below Normal
- SPN 5099 FMI 6Engine Oil Pressure Low Lamp Data - Current Above Normal
- SPN 51 FMI 3Engine Throttle Valve 1 Position : Voltage Above Normal
- SPN 51 FMI 4Engine Throttle Valve 1 Position : Voltage Below Normal
- SPN 5246Aftertreatment SCR Operator Inducement Severity : High - most severe (3)
- SPN 5246 FMI 15Aftertreatment SCR Operator Inducement Severity : High - least severe (1)
- SPN 5246 FMI 16Aftertreatment SCR Operator Inducement Severity : High - moderate severity (2)
- SPN 5276 FMI 7Engine Exhaust Manifold Bank #1 Flow Balance Valve Actuator Control : Not Responding Properly
- SPN 527 FMI 7Engine Exhaust Manifold Bank #1 Flow Balance Valve Not Responding to Command
- SPN 5298 FMI 17Aftertreatment #1 Diesel Oxidation Catalyst Conversion Efficiency : Low - least severe (1)
- SPN 52 FMI 15High Aftercooler Temperature - least severe
- SPN 52 FMI 16High Aftercooler Temperature - moderate severity
- SPN 5319 FMI 31Aftertreatment 1 Diesel Particulate Filter Incomplete Regeneration
- SPN 5324 FMI 7Engine Glow Plug 1 : Not Responding Properly
- SPN 5325 FMI 7Engine Glow Plug 2 : Not Responding Properly
- SPN 5326 FMI 7Engine Glow Plug 3 : Not Responding Properly
- SPN 5327 FMI 7Engine Glow Plug 4 : Not Responding Properly
- SPN 5357 FMI 31Engine Fuel Injection Quantity Error for Multiple Cylinders
- SPN 5392 FMI 31Aftertreatment #1 Diesel Exhaust Fluid Dosing Unit Loss of Prime
- SPN 5419 FMI 5Engine Throttle Actuator #1 : Current Below Normal
- SPN 5419 FMI 6Engine Throttle Actuator #1 : Current Above Normal
- SPN 5419 FMI 7Engine Throttle Actuator #1 : Not Responding Properlyl
- SPN 5422 FMI 13Engine Intake Manifold #2 Absolute Pressure : Out of Calibration
- SPN 5423 FMI 5Aftertreatment Regeneration Device Fuel Pump Relay : Current Below Normal
- SPN 5423 FMI 6Aftertreatment Regeneration Device Fuel Pump Relay : Current Above Normal
- SPN 5480 FMI 16Aftertreatment 1 Diesel Exhaust Fluid Controller Temperature : High - moderate severity (2)
- SPN 5495 FMI 14Aftertreatment #1 DPF Soot Mean Calibration Offset : Special Instruction
- SPN 5562 FMI 1Low Aftertreatment Cooling Fan Speed
- SPN 5571High Pressure Common Rail Fuel Pressure Relief Valve : High - most severe (3)
- SPN 5571 FMI 10High Pressure Common Rail Fuel Pressure Relief Valve : Abnormal Rate of Change
- SPN 5571 FMI 14High Pressure Common Rail Fuel Pressure Relief Valve : Special Instruction
- SPN 5571 FMI 16High Pressure Common Rail Fuel Pressure Relief Valve : High - moderate severity (2)
- SPN 5571 FMI 2High Pressure Common Rail Fuel Pressure Relief Valve : Erratic, Intermittent, or Incorrect
- SPN 5571 FMI 7High Pressure Common Rail Fuel Pressure Relief Valve : Not Responding Properly
- SPN 5576 FMI 14Aftertreatment #1 Identification Number Module : Special Instruction
- SPN 5576 FMI 2Aftertreatment #1 Identification Number Module : Erratic, Intermittent, or Incorrect
- SPN 5576 FMI 8Aftertreatment #1 Identification Number Module : Abnormal Frequency, Pulse Width, or Period
- SPN 5578 FMI 13Engine Fuel Delivery Absolute Pressure : Out of Calibration
- SPN 5580 FMI 16High Fuel Pressure
- SPN 5580 FMI 17Engine Filtered Fuel Delivery Absolute Pressure : Low - least severe
- SPN 5580 FMI 18Engine Filtered Fuel Delivery Absolute Pressure : Low - moderate severity
- SPN 5584Engine Fuel Filter Degradation : High - Severe severity
- SPN 5584 FMI 15Engine Fuel Filter Degradation : High - least severe
- SPN 5584 FMI 16Engine Fuel Filter Degradation : High - moderate severity
- SPN 5584 FMI 17Engine Injector Metering Rail #1 Cranking Pressure : High - least severe
- SPN 5588 FMI 14Proprietary Network #2 : Special Instruction
- SPN 558 FMI 2Accelerator Pedal #1 Low Idle Switch : Erratic, Intermittent, or Incorrect
- SPN 5625 FMI 3Exhaust Back Pressure Regulator Position : Voltage Above Normal
- SPN 5625 FMI 4Exhaust Back Pressure Regulator Position : Voltage Below Normal
- SPN 5629 FMI 31Particulate Trap Active Regeneration Inhibited Due To Low Exhaust Gas Pressure - Least Severe (1)
- SPN 5798 FMI 7Aftertreatment 1 Diesel Exhaust Fluid Dosing Unit Heater Temperature : Not Responding Properly
- SPN 5826 FMI 15Emission Control System Operator Inducement Severity : High - least severe (1)
- SPN 5826 FMI 16Emission Control System Operator Inducement Severity : High - moderate severity (2)
- SPN 592 FMI 31Engine Idle Shutdown Timer Override (3)
- SPN 593 FMI 1Engine Idle Shutdown has Shutdown Engine : Low - most severe (1)
- SPN 593 FMI 2Engine Idle Shutdown has Shutdown Engine : Erratic, Intermittent, or Incorrect (2)
- SPN 593 FMI 3Engine Idle Shutdown has Shutdown Engine : Voltage Above Normal (3)
- SPN 593 FMI 31Engine Idle Shutdown has Shutdown Engine : Low - most severe (3)
- SPN 594 FMI 18Engine Idle Shutdown Driver Alert Mode : Low - moderate severity (2)
- SPN 594 FMI 31Engine Idle Shutdown Driver Alert Mode
- SPN 623 FMI 5Red Stop Lamp : Current Below Normal
- SPN 623 FMI 6Red Stop Lamp : Current Above Normal
- SPN 624 FMI 5Amber Warning Lamp : Current Below Normal
- SPN 624 FMI 6Amber Warning Lamp : Current Above Normal
- SPN 626 FMI 5Engine Start Enable Device 1 : Current Below Normal
- SPN 626 FMI 6Engine Start Enable Device 1 : Current Above Normal
- SPN 631 FMI 2Calibration Module : Erratic, Intermittent or Incorrect
- SPN 637 FMI 11Engine Timing Sensor : Other Failure Mode
- SPN 639 FMI 14J1939 Network #1 : Special Instruction
- SPN 639 FMI 9J1939 Network #1 : Abnormal Update Rate
- SPN 649 FMI 5Engine Exhaust Back Pressure Regulator Solenoid : Current Below Normal
- SPN 649 FMI 6Engine Exhaust Back Pressure Regulator Solenoid : Current Above Normal
- SPN 649 FMI 7Engine Exhaust Back Pressure Regulator Control Command : Not Responding Properly
- SPN 651 FMI 2Engine Injector Cylinder #01 : Erratic, Intermittent or Incorrect
- SPN 651 FMI 20Engine Injector Cylinder #01 : Data Drifted High
- SPN 651 FMI 21Engine Injector Cylinder #01 : Data Drifted Low
- SPN 651 FMI 5Engine Injector Cylinder #01 : Current Below Normal
- SPN 651 FMI 6Engine Injector Cylinder #01 : Current Above Normal
- SPN 652 FMI 2Engine Injector Cylinder #02 : Erratic, Intermittent or Incorrect
- SPN 652 FMI 20Engine Injector Cylinder #02 : Data Drifted High
- SPN 652 FMI 21Engine Injector Cylinder #02 : Data Drifted Low
- SPN 652 FMI 5Engine Injector Cylinder #02 : Current Below Normal
- SPN 652 FMI 6Engine Injector Cylinder #02 : Current Above Normal
- SPN 653 FMI 2Engine Injector Cylinder #03 : Erratic, Intermittent or Incorrect
- SPN 653 FMI 20Engine Injector Cylinder #03 : Data Drifted High
- SPN 653 FMI 21Engine Injector Cylinder #03 : Data Drifted Low
- SPN 653 FMI 5Engine Injector Cylinder #03 : Current Below Normal
- SPN 653 FMI 6Engine Injector Cylinder #03 : Current Above Normal
- SPN 654 FMI 2Engine Injector Cylinder #04 : Erratic, Intermittent or Incorrect
- SPN 654 FMI 20Engine Injector Cylinder #04 : Data Drifted High
- SPN 654 FMI 21Engine Injector Cylinder #04 : Data Drifted Low
- SPN 654 FMI 5Engine Injector Cylinder #04 : Current Below Normal
- SPN 654 FMI 6Engine Injector Cylinder #04 : Current Above 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.