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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 793–816 of 1939

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P207EIntake Manifold Tuning (IMT) Valve Position Sensor/Switch Circuit Intermittent Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP207E relates to intake manifold tuning (imt) valve position sensor/switch circuit intermittent bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P207FReductant Quality PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP207F relates to reductant quality performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P208AReductant Pump A Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP208A relates to reductant pump a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P208BReductant Pump A Control Performance/Stuck OffCheck soonSensors & Electronics30–120 minutes for initial diagnosisP208B relates to reductant pump a control performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P208CReductant Pump A Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP208C relates to reductant pump a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P208DReductant Pump A Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP208D relates to reductant pump a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P209FReductant Tank Heater Control Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP209F relates to reductant tank heater control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P20ACReductant Metering Unit Temperature Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20AC relates to reductant metering unit temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P20ADReductant Metering Unit Temperature Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20AD relates to reductant metering unit temperature sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P20AEReductant Metering Unit Temperature Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20AE relates to reductant metering unit temperature sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P20AFReductant Metering Unit Temperature Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20AF relates to reductant metering unit temperature sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B0Reductant Metering Unit Temperature Sensor Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B0 relates to reductant metering unit temperature sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B5Reductant Metering Unit Heater Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B5 relates to reductant metering unit heater control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B6Reductant Metering Unit Heater Control Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B6 relates to reductant metering unit heater control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B7Reductant Metering Unit Heater Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B7 relates to reductant metering unit heater control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B8Reductant Metering Unit Heater Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B8 relates to reductant metering unit heater control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P20B9Reductant Heater A Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20B9 relates to reductant heater a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BAReductant Heater A Control Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BA relates to reductant heater a control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BBReductant Heater A Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BB relates to reductant heater a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BCReductant Heater A Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BC relates to reductant heater a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BDReductant Heater B Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BD relates to reductant heater b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BEReductant Heater B Control Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BE relates to reductant heater b control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P20BFReductant Heater B Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20BF relates to reductant heater b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P20C0Reductant Heater B Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP20C0 relates to reductant heater b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.