CAT Engine Fault Codes List: SPN 3484 FMI 5 to SPN 4783 FMI 9
Page 10 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 3484 FMI 5 to SPN 4783 FMI 9
- SPN 3484 FMI 5Aftertreatment #1 Ignition : Current Below Normal
- SPN 3484 FMI 6Aftertreatment #1 Ignition : Current Above Normal
- SPN 3487 FMI 5Aftertreatment #1 Air Pressure Control : Current Below Normal
- SPN 3487 FMI 6Aftertreatment #1 Air Pressure Control : Current Above Normal
- SPN 3487 FMI 7Aftertreatment #1 Air Pressure Control : Not Responding Properly
- SPN 3488 FMI 3Aftertreatment #1 Air Pressure Actuator Position : Voltage Above Normal
- SPN 3488 FMI 4Aftertreatment #1 Air Pressure Actuator Position : Voltage Below Normal
- SPN 3509 FMI 2Sensor Supply Voltage 1 : Erratic, Intermittent, or Incorrect
- SPN 3509 FMI 3Sensor Supply Voltage 1 : Voltage Above Normal
- SPN 3509 FMI 4Sensor Supply Voltage 1 : Voltage Below Normal
- SPN 3510 FMI 2Sensor Supply Voltage 2 : Erratic, Intermittent, or Incorrect
- SPN 3510 FMI 3Sensor Supply Voltage 2 : Voltage Above Normal
- SPN 3510 FMI 4Sensor Supply Voltage 2 : Voltage Below Normal
- SPN 3511 FMI 2Sensor Supply Voltage 3 : Erratic, Intermittent, or Incorrect
- SPN 3516 FMI 16Aftertreatment 1 Diesel Exhaust Fluid Concentration : High - moderate severity (2)
- SPN 3516 FMI 18Aftertreatment 1 Diesel Exhaust Fluid Concentration : Low - moderate severity (2)
- SPN 3530 FMI 31ARD Manually Disabled
- SPN 3556 FMI 7Aftertreatment Fuel Injector #1 : Not Responding Properly
- SPN 3563 FMI 13Engine Intake Manifold #1 Absolute Pressure : Calibration Required
- SPN 3563 FMI 21Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low
- SPN 3563 FMI 4Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal
- SPN 3609 FMI 13Diesel Particulate Filter Intake Pressure 1 : Calibration Required
- SPN 3609 FMI 15Diesel Particulate Filter Intake Pressure 1 : High Least Severe
- SPN 3609 FMI 17Diesel Particulate Filter Intake Pressure 1 : Low Least Severe
- SPN 3609 FMI 18Diesel Particulate Filter Intake Pressure 1 : Low Moderate Severity
- SPN 3609 FMI 21Diesel Particulate Filter Intake Pressure 1 : Data Drifted Low
- SPN 3609 FMI 3Diesel Particulate Filter Intake Pressure 1 : Voltage Above Normal
- SPN 3609 FMI 4Diesel Particulate Filter Intake Pressure 1 : Voltage Below Normal
- SPN 3616 FMI 15Aftertreatment Regeneration Cannot Start Due to Low Engine Temperature
- SPN 3697 FMI 5Particulate Trap Lamp Command : Current Below Normal
- SPN 3697 FMI 6Particulate Trap Lamp Command : Current Above Normal
- SPN 3698 FMI 5Exhaust System High Temperature Lamp Command : Current Below Normal
- SPN 3698 FMI 6Exhaust System High Temperature Lamp Command : Current Above Normal
- SPN 3702 FMI 5Diesel Particulate Filter Active Regeneration Inhibited Status : Current Below Normal
- SPN 3702 FMI 6Diesel Particulate Filter Active Regeneration Inhibited Status : Current Above Normal
- SPN 3703 FMI 31Particulate Trap Active Regeneration Inhibited Due to Inhibit Switch
- SPN 371High DPF #1 Soot Loading
- SPN 3711 FMI 31Particulate Trap Active Regeneration Inhibited Due to Low Exhaust Gas Temperature
- SPN 3712 FMI 15DPF Active Regeneration Inhibited Due to System Fault Active : High - Least Severe (1)
- SPN 3714 FMI 31Particulate Trap Active Regeneration Inhibited Due to Temporary System Lockout
- SPN 3715 FMI 31Particulate Trap Active Regeneration Inhibited Due to Permanent System Lockout
- SPN 3716 FMI 15DPF Active Regeneration Inhibited Due to Engine Not Warmed Up : High - Least Severe(1)
- SPN 3716 FMI 31Aftertreatment Regeneration Cannot Start Due to Low Engine Temperature
- SPN 3719Aftertreatment 1 Diesel Particulate Filter Soot Load Percent : High - most severe (3)
- SPN 3719 FMI 16Aftertreatment 1 Diesel Particulate Filter Soot Load Percent : High - moderate severity (2)
- SPN 3720 FMI 15Particulate Trap #1 Ash Load Percent : High - Least Severe (1)
- SPN 3720 FMI 16Particulate Trap #1 Ash Load Percent : High - Moderate Severity (2)
- SPN 3750 FMI 15DPF #1 Conditions Not Met for Active Regeneration : High - Least Severe (1)
- SPN 3750 FMI 17DPF #1 Conditions Not Met for Active Regeneration
- SPN 3750 FMI 18DPF #1 Conditions Not Met for Active Regeneration
- SPN 3750 FMI 31DPF #1 Conditions Not Met for Active Regeneration
- SPN 3837 FMI 13Aftertreatment 1 Secondary Air Pressure : Calibration Required
- SPN 3837 FMI 17Aftertreatment 1 Secondary Air Pressure : Low - Least Severe
- SPN 3837 FMI 21Aftertreatment 1 Secondary Air Pressure : Data Drifted Low
- SPN 3837 FMI 3Aftertreatment 1 Secondary Air Pressure : Voltage Above Normal
- SPN 3837 FMI 4Aftertreatment 1 Secondary Air Pressure : Voltage Below Normal
- SPN 4077 FMI 15Aftertreatment #1 Fuel Pressure #2 : High - least severe
- SPN 4077 FMI 16Aftertreatment #1 Fuel Pressure #2 : High - moderate severity
- SPN 4077 FMI 17Aftertreatment #1 Fuel Pressure #2 : Low - least severe
- SPN 4077 FMI 18Aftertreatment #1 Fuel Pressure #2 : Low - moderate severity
- SPN 411 FMI 13Engine Exhaust Gas Recirculation Differential Pressure Sensor : Calibration Required
- SPN 411 FMI 15Engine Exhaust Gas Recirculation Differential Pressure : High - least severe
- SPN 411 FMI 16Engine Exhaust Gas Recirculation Differential Pressure : High - moderate severity
- SPN 411 FMI 17411-17 Engine Exhaust Gas Recirculation Differential Pressure : Low - least severe
- SPN 411 FMI 3Engine Exhaust Gas Recirculation Differential Pressure Sensor : Voltage Above Normal
- SPN 411 FMI 4Engine Exhaust Gas Recirculation Differential Pressure Sensor : Voltage Below Normal
- SPN 412 FMI 15Engine Exhaust Gas Recirculation Temperature : High - Least Severe (1)
- SPN 412 FMI 16Engine Exhaust Gas Recirculation Temperature : High - Moderate Severity (2)
- SPN 412 FMI 3Engine Exhaust Gas Recirculation Temperature : Voltage Above Normal
- SPN 412 FMI 4Engine Exhaust Gas Recirculation Temperature : Voltage Below Normal
- SPN 4212 FMI 5Fan Drive Bypass Command Status : Current Below Normal
- SPN 4212 FMI 6Fan Drive Bypass Command Status : Current Above Normal
- SPN 4214 FMI 5Engine Fan Reverse Actuator : Current Below Normal
- SPN 4214 FMI 6Engine Fan Reverse Actuator : Current Above Normal
- SPN 4215 FMI 31Ground Level Shutdown - moderate severity
- SPN 4265 FMI 5Aftertreatment #1 Transformer Secondary Output : Current Below Normal
- SPN 4265 FMI 6Aftertreatment #1 Transformer Secondary Output : Current Above Normal
- SPN 4301 FMI 5Aftertreatment #1 Fuel Injector #1 Heater Control : Current Below Normal
- SPN 4301 FMI 6Aftertreatment #1 Fuel Injector #1 Heater Control : Current Above Normal
- SPN 4334 FMI 16Aftertreatment 1 Diesel Exhaust Fluid Doser Absolute Pressure : High - moderate severity (2)
- SPN 4334 FMI 18Aftertreatment 1 Diesel Exhaust Fluid Doser Absolute Pressure - moderate severity (2)
- SPN 4360 FMI 16Aftertreatment #1 SCR Catalyst Intake Gas Temperature : High - moderate severity (2)
- SPN 4360 FMI 17Aftertreatment #1 SCR Catalyst Intake Gas Temperature : Low - least severe (1)
- SPN 4360 FMI 18Aftertreatment #1 SCR Catalyst Intake Gas Temperature : Low - moderate severity (2)
- SPN 4364 FMI 18Aftertreatment #1 SCR Catalyst Conversion Efficiency : Low - moderate severity (2)
- SPN 4364 FMI 2Aftertreatment #1 SCR Catalyst Conversion Efficiency : Erratic, Intermittent, or Incorrect
- SPN 441High Auxiliary Temperature
- SPN 441 FMI 1Auxiliary Temperature 1 : Low - most severe
- SPN 441 FMI 15Auxiliary Temperature 1 : High - least severe
- SPN 441 FMI 16High Auxiliary Temperature
- SPN 4765 FMI 17Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Low - least severe (1)
- SPN 4765 FMI 3Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Above Normal
- SPN 4765 FMI 4Aftertreatment #1 Diesel Oxidation Catalyst Intake Gas Temperature : Voltage Below Normal
- SPN 4783 FMI 12Diesel Particulate Filter #1 Mean Soot Signal : Failure
- SPN 4783 FMI 13Diesel Particulate Filter #1 Mean Soot Signal : Calibration Required
- SPN 4783 FMI 19Diesel Particulate Filter #1 Mean Soot Signal : Data Error
- SPN 4783 FMI 21Diesel Particulate Filter #1 Mean Soot Signal : Data Drifted Low
- SPN 4783 FMI 3Diesel Particulate Filter #1 Mean Soot Signal : Voltage Above Normal
- SPN 4783 FMI 4Diesel Particulate Filter #1 Mean Soot Signal : Voltage Below Normal
- SPN 4783 FMI 9Diesel Particulate Filter #1 Mean Soot Signal : Abnormal Update Rate
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.