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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 1753–1776 of 1939

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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.P2D12Exhaust Flow Control Valve B Position Not LearnedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D12 relates to exhaust flow control valve b position not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D13Exhaust Flow Control Valve C Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D13 relates to exhaust flow control valve c control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D14Exhaust Flow Control Valve C Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D14 relates to exhaust flow control valve c control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D15Exhaust Flow Control Valve C Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D15 relates to exhaust flow control valve c control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D16Exhaust Flow Control Valve C Control PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D16 relates to exhaust flow control valve c control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D17Exhaust Flow Control Valve C Position CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D17 relates to exhaust flow control valve c position circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D18Exhaust Flow Control Valve C Position Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D18 relates to exhaust flow control valve c position circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D19Exhaust Flow Control Valve C Position Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D19 relates to exhaust flow control valve c position circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D1AExhaust Flow Control Valve C Position Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D1A relates to exhaust flow control valve c position circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D1BExhaust Flow Control Valve C Position Not LearnedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D1B relates to exhaust flow control valve c position not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D1DReductant System Leak Detected – Small LeakCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D1D relates to reductant system leak detected – small leak. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D1EReductant System Leak Detected – Large LeakCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2D1E relates to reductant system leak detected – large leak. Check the fault conditions and vehicle-specific procedure before replacing parts.