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Generic Fault Codes & DTC List

Manufacturer and ECU-specific fault-code meanings. Check the stated ECU, model and code format against your diagnostic scan.

Generic fault codes — page 24
CodeMeaningApplicability
P0654Engine rpm, output -circuit malfunctionGeneric Generic OBD
P0655Engine hot lamp output -circuit malfunctionGeneric Generic OBD
P0656Fuel level output -circuit malfunctionGeneric Generic OBD
P0657Actuator supply voltage -circuit openGeneric Generic OBD
P0658Actuator supply voltage -circuit lowGeneric Generic OBD
P0659Actuator supply voltage -circuit highGeneric Generic OBD
P065AGenerator System PerformanceGeneric Generic OBD
P065BGenerator Control Circuit Range/PerformanceGeneric Generic OBD
P065CGenerator Mechanical PerformanceGeneric Generic OBD
P065DReductant System Malfunction Lamp Control CircuitGeneric Generic OBD
P065EIntake Manifold Tuning Valve PerformanceGeneric Generic OBD
P065FIntake Manifold Tuning Valve PerformanceGeneric Generic OBD
P0660Intake manifold air control solenoid, bank 1 -circuit openGeneric Generic OBD
P0661Intake manifold air control solenoid, bank 1 -circuit lowGeneric Generic OBD
P0662Intake manifold air control solenoid, bank 1 -circuit highGeneric Generic OBD
P0663Intake manifold air control solenoid, bank 2 -circuit openGeneric Generic OBD
P0664Intake manifold air control solenoid, bank 2 -circuit lowGeneric Generic OBD
P0665Intake manifold air control solenoid, bank 2 -circuit highGeneric Generic OBD
P0666PCM/ECM/TCM internal temperature sensor circuit malfunctionGeneric Generic OBD
P0667PCM/ECM/TCM internal temperature sensor range/performanceGeneric Generic OBD
P0668PCM/ECM/TCM internal temperature sensor -circuit lowGeneric Generic OBD
P0669PCM/ECM/TCM internal temperature sensor -circuit highGeneric Generic OBD
P066ACylinder 1 Glow Plug Control Circuit LowGeneric Generic OBD
P066BCylinder 1 Glow Plug Control Circuit HighGeneric Generic OBD
P066CCylinder 2 Glow Plug Control Circuit LowGeneric Generic OBD
P066DCylinder 2 Glow Plug Control Circuit HighGeneric Generic OBD
P066ECylinder 3 Glow Plug Control Circuit LowGeneric Generic OBD
P066FCylinder 3 Glow Plug Control Circuit HighGeneric Generic OBD
P0670Glow plug control module -circuit malfunctionGeneric Generic OBD
P0671Glow plug, cylinder 1 -circuit malfunctionGeneric Generic OBD
P0672Glow plug, cylinder 2 -circuit malfunctionGeneric Generic OBD
P0673Glow plug, cylinder 3 -circuit malfunctionGeneric Generic OBD
P0674Glow plug, cylinder 4 -circuit malfunctionGeneric Generic OBD
P0675Glow plug, cylinder 5 -circuit malfunctionGeneric Generic OBD
P0676Glow plug, cylinder 6 -circuit malfunctionGeneric Generic OBD
P0677Glow plug, cylinder 7 -circuit malfunctionGeneric Generic OBD
P0678Glow plug, cylinder 8 -circuit malfunctionGeneric Generic OBD
P0679Glow plug, cylinder 9 -circuit malfunctionGeneric Generic OBD
P067ACylinder 4 Glow Plug Control Circuit LowGeneric Generic OBD
P067BCylinder 4 Glow Plug Control Circuit HighGeneric Generic OBD
P067CCylinder 5 Glow Plug Control Circuit LowGeneric Generic OBD
P067DCylinder 5 Glow Plug Control Circuit HighGeneric Generic OBD
P067ECylinder 6 Glow Plug Control Circuit LowGeneric Generic OBD
P067FCylinder 6 Glow Plug Control Circuit HighGeneric Generic OBD
P0680Glow plug, cylinder 10 -circuit malfunctionGeneric Generic OBD
P0681Glow plug, cylinder 11 -circuit malfunctionGeneric Generic OBD
P0682Glow plug, cylinder 12 -circuit malfunctionGeneric Generic OBD
P0683Glow plug control module/ECM/PCM communication -malfunctionGeneric Generic OBD
P0684Glow plug control module/ECM/PCM communication range/performanceGeneric Generic OBD
P0685ECM/PCM power relay -circuit openGeneric Generic OBD

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