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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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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 1729–1752 of 1939

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P2C8DDC/DC Converter Temperature Sensor D Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C8D relates to dc/dc converter temperature sensor d circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C8EDC/DC Converter Temperature Sensor D Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C8E relates to dc/dc converter temperature sensor d circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C8FDC/DC Converter Temperature Sensor D Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C8F relates to dc/dc converter temperature sensor d circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C90Crankcase Ventilation System - Hose A DisconnectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C90 relates to crankcase ventilation system - hose a disconnected. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C91Crankcase Ventilation System - Hose B DisconnectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C91 relates to crankcase ventilation system - hose b disconnected. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C99Throttle Actuator A Control Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C99 relates to throttle actuator a control exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C9AThrottle Actuator B Control Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C9A relates to throttle actuator b control exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C9BCold Start Turbocharger/Supercharger Wastegate Actuator A Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C9B relates to cold start turbocharger/supercharger wastegate actuator a range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C9CCold Start Turbocharger/Supercharger Wastegate Actuator B Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2C9C relates to cold start turbocharger/supercharger wastegate actuator b range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CA5DC/DC Converter Temperature Sensor E CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CA5 relates to dc/dc converter temperature sensor e circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CA6DC/DC Converter Temperature Sensor E Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CA6 relates to dc/dc converter temperature sensor e circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CA7DC/DC Converter Temperature Sensor E Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CA7 relates to dc/dc converter temperature sensor e circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CA8DC/DC Converter Temperature Sensor E Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CA8 relates to dc/dc converter temperature sensor e circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CA9DC/DC Converter Temperature Sensor F CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CA9 relates to dc/dc converter temperature sensor f circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CAADC/DC Converter Temperature Sensor F Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CAA relates to dc/dc converter temperature sensor f circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CABDC/DC Converter Temperature Sensor F Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CAB relates to dc/dc converter temperature sensor f circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CACDC/DC Converter Temperature Sensor F Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CAC relates to dc/dc converter temperature sensor f circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CB6Turbocharger/Supercharger B Boost System PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CB6 relates to turbocharger/supercharger b boost system performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CB7Turbocharger/Supercharger Boost Pressure B Not Detected – MechanicalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CB7 relates to turbocharger/supercharger boost pressure b not detected – mechanical. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CB8Turbocharger/Supercharger Boost Pressure B Too High – MechanicalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CB8 relates to turbocharger/supercharger boost pressure b too high – mechanical. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CBDPCV Heater “B” Control Circuit /OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CBD relates to pcv heater “b” control circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CBEPCV Heater “B” Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CBE relates to pcv heater “b” control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CBFPCV Heater “B” Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CBF relates to pcv heater “b” control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CC0PCV Heater “B” PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CC0 relates to pcv heater “b” performance. Check the fault conditions and vehicle-specific procedure before replacing parts.