CAT Fault Codes List: 6164 to 644
Page 35 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 6164 to 644
- 6164Engine Cylinder 4 Pressure Fault
- 6165Engine Cylinder 5 Pressure Fault
- 6166Engine Cylinder 6 Pressure Fault
- 6167Engine Cylinder 7 Pressure Fault
- 6168Engine Cylinder 8 Pressure Fault
- 6169Engine Cylinder 9 Pressure Fault
- 617Parking brake actuator engaged.
- 6170Engine Cylinder 10 Pressure Fault
- 6171Engine Cylinder 11 Pressure Fault
- 6172Engine Cylinder 12 Pressure Fault
- 6173Engine Cylinder 13 Pressure Fault
- 6174Engine Cylinder 14 Pressure Fault
- 6177Engine Cylinder 17 Pressure Fault
- 6178Engine Cylinder 18 Pressure Fault
- 6179Engine Cylinder 19 Pressure Fault
- 618Parking brake actuator disengaged.
- 6180Engine Cylinder 20 Pressure issue
- 6181Engine Cylinder #1 Gaseous Fuel Valve fault
- 6182Engine Cylinder #2 Gaseous Fuel Valve fault
- 6183Engine Cylinder #3 Gaseous Fuel Valve fault
- 6184Engine Cylinder #4 Gaseous Fuel Valve fault
- 6185Engine Cylinder #5 Gaseous Fuel Valve fault
- 6186Engine Cylinder #6 Gaseous Fuel Valve fault
- 6187Engine Cylinder #7 Gaseous Fuel Valve fault
- 6188Engine Cylinder #8 Gaseous Fuel Valve fault
- 6189Engine Cylinder #9 Gaseous Fuel Valve fault
- 619Parking brake actuator fault.
- 6190Engine Cylinder #10 Gaseous Fuel Valve fault
- 6191Engine Cylinder #11 Gaseous Fuel Valve fault
- 6192Engine Cylinder #12 Gaseous Fuel Valve fault
- 6193Engine Cylinder #13 Gaseous Fuel Valve fault
- 6194Engine Cylinder #14 Gaseous Fuel Valve fault
- 6195Engine Cylinder #15 Gaseous Fuel Valve fault
- 6196Engine Cylinder #16 Gaseous Fuel Valve fault
- 6197Engine Cylinder #17 Gaseous Fuel Valve fault
- 6198Engine Cylinder #18 Gaseous Fuel Valve fault
- 6199Engine Cylinder #19 Gaseous Fuel Valve fault
- 620Starter Lockout Active
- 6200Engine Cylinder #20 Gaseous Fuel Valve fault
- 6201Engine Turbocharger Compressor Actuator #1 command issue
- 621Downshift Switch
- 622Hoist System Not In Float
- 623Low Left Track Forward <Travel> Steering Pressure
- 624Low Left Track Reverse <Travel> Steering Pressure
- 625Low Right Track Forward <Travel> Steering Pressure
- 626Inlet Air Heater fault: Lack of heat in the Intake Manifold
- 627Parking Brake Applied With Machine In Motion
- 628ECM Memory Error
- 629ECM Error – Level 2 Monitoring
- 63Low Cranking Fuel Pressure
- 630Switched Sensor #1 Activated
- 6309Aftertreatment 1 DEF Control Module Power Supply issue
- 631Transmission Clutch 1 Solenoid
- 6310Aftertreatment 2 DEF Control Module Power Supply issue
- 632Engine fuel shutoff valve fault.
- 6322Aftertreatment #1 SCR Desulfation Too Frequent error
- 6324Aftertreatment 1 DEF Dosing Valve 2 fault
- 6325Aftertreatment 2 DEF Dosing Valve 2 fault
- 6326Aftertreatment 1 DEF Dosing Valve 1 Heater fault
- 6327Aftertreatment 1 DEF Dosing Valve 2 Heater fault
- 6328Aftertreatment 2 DEF Dosing Valve 1 Heater fault
- 6329Aftertreatment 2 DEF Dosing Valve 2 Heater fault
- 633FPCV open load/circuit
- 6334Engine Timing Actuator #1 Requested Position issue
- 6335Engine Timing Actuator #2 Requested Position issue
- 634Engine throttle bypass valve fault.
- 635Engine timing actuator fault.
- 636CMP and CKP Synchronization Error
- 637CKP signal inactive
- 638Engine fuel rack actuator fault.
- 639J1939 Data Link Error (ECM unable to transmit or receive)
- 6390Engine Cylinder Pressure Monitor #1 Fault
- 6391Engine Cylinder Pressure Monitor #2 Fault
- 6398Engine Cylinder #1 Knock Detected
- 6399Engine Cylinder #1 Pressure Sensor Fault
- 640Water Spray Activation Time Exceeded
- 64-02Loss of RPM Signal on Engine Speed/Timing Sensor #2
- 6403Engine Cylinder #2 Pressure Sensor Fault
- 6406Engine Cylinder #3 Knock Detected
- 6407Engine Cylinder #3 Pressure Sensor Fault
- 641Turbocharger variable geometry actuator #1 fault.
- 6410Engine Cylinder #4 Knock Detected
- 64-11No Pattern on Engine Speed/Timing Sensor #2
- 64-12fault codes. for the engine speed/timing sensors, resume
- 6414Engine Cylinder #5 Pressure Sensor Fault
- 6418Engine Cylinder #6 Knock Detected
- 6419Engine Cylinder #6 Pressure Sensor Fault
- 642Turbocharger variable geometry actuator #2 fault.
- 6422Engine Cylinder #7 Knock Detected
- 6423Engine Cylinder #7 Pressure Sensor Fault
- 6426Engine Cylinder #8 Knock Detected
- 6427Engine Cylinder #8 Pressure Sensor Fault
- 643External fuel command input fault.
- 6430Engine Cylinder #9 Knock Detected
- 6431Engine Cylinder #9 Pressure Sensor Fault
- 6434Engine Cylinder #10 Knock Detected
- 6435Engine Cylinder #10 Pressure Sensor Fault
- 6438Engine Cylinder #11 Knock Detected
- 6439Engine Cylinder #11 Pressure Sensor Fault
- 644External speed command input fault.
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.