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9,253 diagnostic guides

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Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

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Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

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Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 529–552 of 2110

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P05E8Engine Oil Bypass Valve Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05E8 relates to engine oil bypass valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P05E9Engine Oil Bypass Valve Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05E9 relates to engine oil bypass valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05EAEngine Oil Bypass Valve Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05EA relates to engine oil bypass valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05F8Reductant Heater Control Module PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05F8 relates to reductant heater control module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P05F9Stop-Start Status Signal CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05F9 relates to stop-start status signal circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P05FAStop-Start Status Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05FA relates to stop-start status signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P05FBStop-Start Status Signal Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05FB relates to stop-start status signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05FDTurbocharger/Supercharger Boost Control A Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05FD relates to turbocharger/supercharger boost control a temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P05FEActive Grille Air Shutter C Performance/Stuck OffCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05FE relates to active grille air shutter c performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P05FFBrake Pressure Sensor / Brake Pedal Position Sensor CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP05FF relates to brake pressure sensor / brake pedal position sensor correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P0601Internal Control Module Memory Checksum ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0601 relates to internal control module memory checksum error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0602Control Module Programming ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0602 relates to control module programming error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0603Internal Control Module Keep Alive Memory (KAM) ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0603 relates to internal control module keep alive memory (kam) error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0604Internal Control Module Random Access Memory (RAM) ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0604 relates to internal control module random access memory (ram) error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0605Internal Control Module Read Only Memory (ROM) ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0605 relates to internal control module read only memory (rom) error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0607Control Module PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0607 relates to control module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0608Control Module VSS Output ACheck soonSensors & Electronics30–120 minutes for initial diagnosisP0608 relates to control module vss output a. Check the fault conditions and vehicle-specific procedure before replacing parts.P0609Control Module VSS Output BCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0609 relates to control module vss output b. Check the fault conditions and vehicle-specific procedure before replacing parts.P060AInternal Control Module Monitoring Processor PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP060A relates to internal control module monitoring processor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P060BInternal Control Module A/D Processing PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP060B relates to internal control module a/d processing performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P060CInternal Control Module Main Processor PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP060C relates to internal control module main processor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P060DInternal Control Module Accelerator Pedal Position PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP060D relates to internal control module accelerator pedal position performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P060EInternal Control Module Throttle Position PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP060E relates to internal control module throttle position performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0610Control Module Vehicle Options ErrorCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0610 relates to control module vehicle options error. Check the fault conditions and vehicle-specific procedure before replacing parts.