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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 169–192 of 1570

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P0A37Generator Temperature Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A37 concerns generator temperature sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A38Generator Temperature Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A38 concerns generator temperature sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A39Generator Temperature Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A39 concerns generator temperature sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A3AGenerator Temperature Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3A concerns generator temperature sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A3BGenerator A Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3B concerns generator a over temperature. Learn what this fault indicates and where to begin diagnosis.P0A3CDrive Motor A Inverter Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3C concerns drive motor a inverter over temperature. Learn what this fault indicates and where to begin diagnosis.P0A3DDrive Motor B Inverter Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3D concerns drive motor b inverter over temperature. Learn what this fault indicates and where to begin diagnosis.P0A3EGenerator Inverter Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3E concerns generator inverter over temperature. Learn what this fault indicates and where to begin diagnosis.P0A3FDrive Motor A Position Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A3F concerns drive motor a position sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0A40Drive Motor A Position Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A40 concerns drive motor a position sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A41Drive Motor A Position Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A41 concerns drive motor a position sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A42Drive Motor A Position Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A42 concerns drive motor a position sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A43Drive Motor A Position Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A43 concerns drive motor a position sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A44Drive Motor A Position Sensor Circuit OverspeedCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A44 concerns drive motor a position sensor circuit overspeed. Learn what this fault indicates and where to begin diagnosis.P0A45Drive Motor B Position Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A45 concerns drive motor b position sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0A46Drive Motor B Position Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A46 concerns drive motor b position sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A47Drive Motor B Position Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A47 concerns drive motor b position sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A48Drive Motor B Position Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A48 concerns drive motor b position sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A49Drive Motor B Position Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A49 concerns drive motor b position sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A4ADrive Motor B Position Sensor Circuit OverspeedCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A4A concerns drive motor b position sensor circuit overspeed. Learn what this fault indicates and where to begin diagnosis.P0A4BGenerator Position Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A4B concerns generator position sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0A4CGenerator Position Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A4C concerns generator position sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A4DGenerator Position Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A4D concerns generator position sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A4EGenerator Position Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A4E concerns generator position sensor circuit high. Learn what this fault indicates and where to begin diagnosis.