CAT Engine Fault Codes List: 3110-5 to 3485-4
Page 4 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 3110-5 to 3485-4
- 3110-5Aftertreatment #1 SCR Catalyst Reagent Line Heater #1 : Current Below Normal
- 3110-6Aftertreatment #1 SCR Catalyst Reagent Line Heater #1 : Current Above Normal
- 3111-5Aftertreatment #1 SCR Catalyst Reagent Line Heater #2 : Current Below Normal
- 3111-6Aftertreatment #1 SCR Catalyst Reagent Line Heater #2 : Current Above Normal
- 3112-5Aftertreatment #1 SCR Catalyst Reagent Line Heater #3 : Current Below Normal
- 3112-6Aftertreatment #1 SCR Catalyst Reagent Line Heater #3 : Current Above Normal
- 3118-5Aftertreatment #1 SCR Catalyst Reagent Pump Motor Speed Sensor : Current Below Normal
- 3118-6Aftertreatment #1 SCR Catalyst Reagent Pump Motor Speed Sensor : Current Above Normal
- 3118-8Aftertreatment #1 SCR Catalyst Reagent Pump Motor Speed Sensor : Abnormal Frequency, Pulse Width, or Period
- 3126-5Aftertreatment #1 SCR Catalyst Reagent Tank #1 Heater Coolant Diverter Solenoid : Current Below Normal
- 3126-6Aftertreatment #1 SCR Catalyst Reagent Tank #1 Heater Coolant Diverter Solenoid : Current Above Normal
- 3126-7Aftertreatment #1 SCR Catalyst Reagent Tank #1 Heater Coolant Diverter Solenoid : Not Responding Properly
- 3130-12Aftertreatment #1 DEF Tank Volume : Failure
- 3130-2Aftertreatment #1 DEF Tank Volume : Erratic, Intermittent, or Incorrect
- 3130-3Aftertreatment #1 SCR Catalyst Reagent Tank #1 Level Sensor : Voltage Above Normal
- 3130-4Aftertreatment #1 SCR Catalyst Reagent Tank #1 Level Sensor : Voltage Below Normal
- 3134-12Aftertreatment #1 DEF Tank Temperature : Failure
- 3134-3Aftertreatment #1 SCR Catalyst Reagent Tank #1 Temperature Sensor : Voltage Above Normal
- 3134-4Aftertreatment #1 SCR Catalyst Reagent Tank #1 Temperature Sensor : Voltage Below Normal
- 3138-12Aftertreatment #1 Outlet NH3 : Failure
- 3180-5Aftertreatment #1 Ignition Transformer Secondary : Current Below Normal
- 3182-3Aftertreatment #1 Fuel Injector #1 Heater : Voltage Above Normal
- 3182-4Aftertreatment #1 Fuel Injector #1 Heater : Voltage Below Normal
- 3182-5Aftertreatment #1 Fuel Injector #1 Heater : Current Below Normal
- 3182-6Aftertreatment #1 Fuel Injector #1 Heater : Current Above Normal
- 3183-2DPF Regeneration Force Switch - Erratic, Intermittent, or Incorrrect
- 3184-2DPF Regeneration Inhibit Switch : Erratic, Intermittent, or Incorrect
- 3239-5Air Shutoff Relay : Current Below Normal
- 3239-6Air Shutoff Relay : Current Above Normal
- 324-5Warning Lamp Open/Short to Ground
- 324-6Warning Lamp Short to Ground
- 3257-3Air Inlet Heater : Voltage Above Normal
- 3257-4Air Inlet Heater : Voltage Below Normal
- 3372-3Engine Charge Air Cooler #1 Outlet Temperature Sensor : Voltage Above Normal
- 3372-4Engine Charge Air Cooler #1 Outlet Temperature Sensor : Voltage Below Normal
- 338-11Engine Pre-Lube Pump Relay : Other Failure Mode
- 338-5Engine Pre-Lube Pump Relay : Current Below Normal
- 3385-13Engine Exhaust GasRecirculation Inlet Pressure : Calibration Required
- 3385-21Engine Exhaust Gas Recirculation Inlet Pressure : Data Drifted Low
- 3385-3Engine Exhaust Gas Recirculation Intake Pressure Sensor : Voltage Above Normal
- 3385-4Engine Exhaust Gas Recirculation Intake Pressure Sensor : Voltage Below Normal
- 338-6Engine Pre-Lube Pump Relay : Current Above Normal
- 3386-3Engine Exhaust Gas Recirculation Temperature Sensor : Voltage Above Normal
- 3386-4Engine Exhaust Gas Recirculation Temperature Sensor : Voltage Below Normal
- 3387-13Engine Exhaust Gas Recirculation Differential Pressure : Out of Calibration
- 3387-2EGR Differential Pressure Sensor : Erratic, Intermittent, or Incorrect
- 3387-3Engine Exhaust Gas Recirculation Differential Pressure Sensor : Voltage Above Normal
- 3387-4Engine Exhaust Gas Recirculation Differential Pressure Sensor : Voltage Below Normal
- 339-12Diesel Particulate Filter #1 Mean Soot Signal : Failure
- 3391-5ARD Fuel Pressure #2 Control Actuator : Current Below Normal
- 3391-6ARD Fuel Pressure #2 Control Actuator : Current Above Normal
- 3397-12DPF #1 Soot Loading Sensor : Failure
- 3397-13Diesel Particulate Filter #1 Mean Soot Signal : Calibration Required
- 3397-14DPF #1 Soot Loading Sensor : Special Instruction
- 3397-19DPF #1 Soot Loading Sensor : Data Error
- 3397-21Diesel Particulate Filter #1 Mean Soot Signal : Failure
- 3397-3Diesel Particulate Filter #1 Mean Soot Signal : Voltage Above Normal
- 3397-4Diesel Particulate Filter #1 Mean Soot Signal : Voltage Below Normal
- 3397-9Diesel Particulate Filter #1 Mean Soot Signal : Abnormal Update Rate
- 34Loss Of Engine RPM Signal
- 3405-5Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Below Normal
- 3405-6Engine Exhaust Gas Recirculation (EGR) Valve Control : Current Above Normal
- 3407-3EGR Valve Position Sensor : Voltage Above Normal
- 3407-4EGR Valve Position Sensor : Voltage Below Normal
- 3409-5Engine Exhaust Manifold Bank #1 Flow Balancce Valve Solenoid - Current Below Normal
- 3409-6Engine Exhaust Manifold Bank #1 Flow Balancce Valve Solenoid - Current Above Normal
- 3413-5ARD Fuel Flow Diverter Actuator : Current Below Normal
- 3413-6ARD Fuel Flow Diverter Actuator : Current Above Normal
- 3417-3Fuel Filter (suction side) Intake Pressure Sensor : Voltage Above Normal
- 3417-4Fuel Filter (suction side) Intake Pressure Sensor : Voltage Below Normal
- 342-3Secondary Engine Speed Sensor Voltage Above Normal
- 342-7Secondary Engine Speed Sensor not Responding Properly
- 3427-5Aftertreatment Fuel Pump Relay : Current Below Normal
- 3427-6Aftertreatment Fuel Pump Relay : Current Above Normal
- 3434-3Aftertreatment #1 SCR Catalyst Reagent Tank #1 Temperature Sensor : Voltage Above Normal
- 3464-13DPF #1 Intake Pressure Sensor : Calibration Required
- 3464-21DPF #1 Intake Pressure Sensor : Data Drifted Low
- 3464-3DPF #1 Intake Pressure Sensor : Voltage Above Normal
- 3464-4DPF #1 Intake Pressure Sensor : Voltage Below Normal
- 3467-5Main Power Relay : Current Below Normal
- 3467-6Main Power Relay : Current Above Normal
- 3468-14Aftertreatment #1 Identification Number Module : Special Instruction
- 3468-2Aftertreatment #1 Identification Number Module : Erratic, Intermittent, or Incorrect
- 3468-8Aftertreatment #1 Identification Number Module : Abnormal Frequency, Pulse Width, or Period
- 3469-14Aftertreatment #2 Identification Number Module - Special Instruction
- 3469-2Aftertreatment #2 Identification Number Module - Erratic, Intermittent, or Incorrect
- 3469-8Aftertreatment #2 Identification Number Module - Abnormal Frequency, Pulse Width, or Period
- 3471-5ARD Air Pressure Control Module : Current Below Normal
- 3471-6ARD Air Pressure Control Module : Current Above Normal
- 3472-14ARD Air Pressure Control System : Special Instruction
- 3472-3ARD Air Pressure Control System : Voltage Above Normal
- 3472-4ARD Air Pressure Control System : Voltage Below Normal
- 3472-9ARD Air Pressure Control System : Abnormal Update Rate
- 3482-11Sensor Supply #3 : Other Failure Mode
- 3482-3Sensor Supply Voltage 3 : Voltage Above Normal
- 3482-4Sensor Supply Voltage 3 : Voltage Below Normal
- 3483-3Sensor Supply Voltage 4 : Voltage Above Normal
- 3483-4Sensor Supply Voltage 4 : Voltage Below Normal
- 3485-3Aftertreatment #1 Exhaust Gas Temperature #1 Sensor : Voltage Above Normal
- 3485-4Aftertreatment #1 Exhaust Gas Temperature #1 Sensor : Voltage 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.