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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

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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 1873–1896 of 2110

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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.P2CD4A/C Refrigerant Pressure Sensor A/B CorrelationLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2CD4 relates to a/c refrigerant pressure sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD5Turbocharger/Supercharger Bypass Valve C StuckCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CD5 relates to turbocharger/supercharger bypass valve c stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD6Turbocharger/Supercharger Boost Sensor D CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CD6 relates to turbocharger/supercharger boost sensor d circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD7Turbocharger/Supercharger Boost Sensor D Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CD7 relates to turbocharger/supercharger boost sensor d circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD8Turbocharger/Supercharger Boost Sensor D Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CD8 relates to turbocharger/supercharger boost sensor d circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD9Turbocharger/Supercharger Boost Sensor D Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CD9 relates to turbocharger/supercharger boost sensor d circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CE1Intake Air Heater C Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CE1 relates to intake air heater c circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CE2Intake Air Heater C Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CE2 relates to intake air heater c circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CE3Intake Air Heater C Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CE3 relates to intake air heater c circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CE4Intake Air Heater C Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2CE4 relates to intake air heater c circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D0FEngine Pre-Ignition Above ThresholdCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D0F relates to engine pre-ignition above threshold. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D10Engine Pre-Ignition Above Threshold - Forced Limited PowerCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D10 relates to engine pre-ignition above threshold - forced limited power. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D11Exhaust Flow Control Valve A Position Not LearnedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D11 relates to exhaust flow control valve a position not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.