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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 1633–1656 of 1939

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P2AF0Intake Air O2 Sensor Negative Current Control Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2AF0 relates to intake air o2 sensor negative current control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2AF1Intake Air O2 Sensor Negative Current Control Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP2AF1 relates to intake air o2 sensor negative current control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B6ETurbocharger/Supercharger A Temperature Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B6E relates to turbocharger/supercharger a temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B6FTurbocharger/Supercharger A Temperature Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B6F relates to turbocharger/supercharger a temperature sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B70Turbocharger/Supercharger A Temperature Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B70 relates to turbocharger/supercharger a temperature sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B71Turbocharger/Supercharger A Temperature Sensor Circuit Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B71 relates to turbocharger/supercharger a temperature sensor circuit circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7FTurbocharger/Supercharger Boost Control Module A Calibration Not Learned/ProgrammedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B7F relates to turbocharger/supercharger boost control module a calibration not learned/programmed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B80Turbocharger/Supercharger Boost Control Module B Calibration Not Learned/ProgrammedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B80 relates to turbocharger/supercharger boost control module b calibration not learned/programmed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B81Wastegate Position Sensor A Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B81 relates to wastegate position sensor a circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B82Wastegate Position Sensor B Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B82 relates to wastegate position sensor b circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B88Intake Air O2 Sensor Circuit Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B88 relates to intake air o2 sensor circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8BIntake Air O2 Sensor Heater Control Circuit/Open Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8B relates to intake air o2 sensor heater control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8CIntake Air O2 Sensor Heater Control Circuit Range/Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8C relates to intake air o2 sensor heater control circuit range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8DIntake Air O2 Sensor Heater Control Circuit Low Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8D relates to intake air o2 sensor heater control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8EIntake Air O2 Sensor Heater Control Circuit High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8E relates to intake air o2 sensor heater control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8FTurbocharger/Supercharger B Temperature Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B8F relates to turbocharger/supercharger b temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B90Turbocharger/Supercharger B Temperature Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B90 relates to turbocharger/supercharger b temperature sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B91Turbocharger/Supercharger B Temperature Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B91 relates to turbocharger/supercharger b temperature sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B92Turbocharger/Supercharger B Temperature Sensor Circuit Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B92 relates to turbocharger/supercharger b temperature sensor circuit circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B93Wastegate Position Sensor A Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B93 relates to wastegate position sensor a exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B94Wastegate Position Sensor B Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B94 relates to wastegate position sensor b exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B97Exhaust Pressure Control Valve A Position Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B97 relates to exhaust pressure control valve a position exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B98Exhaust Pressure Control Valve A Supply LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B98 relates to exhaust pressure control valve a supply low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B99Exhaust Pressure Control Valve A Driver Current/Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B99 relates to exhaust pressure control valve a driver current/temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.