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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 145–168 of 1939

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P01B9Engine Oil Temperature Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01B9 relates to engine oil temperature sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P01BAEngine Oil Temperature Sensor B Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01BA relates to engine oil temperature sensor b range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P01BBEngine Oil Temperature Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01BB relates to engine oil temperature sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P01BCEngine Oil Temperature Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01BC relates to engine oil temperature sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P01BDEngine Oil Temperature Sensor B Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01BD relates to engine oil temperature sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F1O2 Sensor Circuit Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F1 relates to o2 sensor circuit bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F4O2 Sensor Circuit Slow Response Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F4 relates to o2 sensor circuit slow response bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F5O2 Sensor Circuit No Activity Detected Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F5 relates to o2 sensor circuit no activity detected bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F6O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F6 relates to o2 sensor signal biased/stuck lean bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01F7O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 4Check soonSensors & Electronics30–120 minutes for initial diagnosisP01F7 relates to o2 sensor signal biased/stuck rich bank 1 sensor 4. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FATurbocharger Outlet Pressure Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FA relates to turbocharger outlet pressure sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FBTurbocharger Outlet Pressure Sensor B Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FB relates to turbocharger outlet pressure sensor b range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FCTurbocharger Outlet Pressure Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FC relates to turbocharger outlet pressure sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FDTurbocharger Outlet Pressure Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FD relates to turbocharger outlet pressure sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FETurbocharger Outlet Pressure Sensor B Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FE relates to turbocharger outlet pressure sensor b intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P01FFTurbocharger Outlet Pressure Sensor A/B CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP01FF relates to turbocharger outlet pressure sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P0220Throttle/Pedal Position Sensor/Switch B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0220 relates to throttle/pedal position sensor/switch b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0222Throttle/Pedal Position Sensor/Switch B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0222 relates to throttle/pedal position sensor/switch b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022ACharge Air Cooler Bypass Control A Circuit /OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022A relates to charge air cooler bypass control a circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P022BCharge Air Cooler Bypass Control A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022B relates to charge air cooler bypass control a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022CCharge Air Cooler Bypass Control A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022C relates to charge air cooler bypass control a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P022DCharge Air Cooler Bypass Control B Circuit /OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022D relates to charge air cooler bypass control b circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P022ECharge Air Cooler Bypass Control B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022E relates to charge air cooler bypass control b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022FCharge Air Cooler Bypass Control B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022F relates to charge air cooler bypass control b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.