Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

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.

Electrical & Charging System Check soon Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

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 1570

Most searched first

P0A1FBattery Energy Control Module A PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A1F concerns battery energy control module a performance. Learn what this fault indicates and where to begin diagnosis.P0A20Motor Torque Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A20 concerns motor torque sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A21Motor Torque Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A21 concerns motor torque sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A22Generator Torque Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A22 concerns generator torque sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0A23Generator Torque Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A23 concerns generator torque sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A24Generator Torque Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A24 concerns generator torque sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A25Generator Torque Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A25 concerns generator torque sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A26Generator Torque Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A26 concerns generator torque sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A27Hybrid/EV Battery Power Off CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A27 concerns hybrid/ev battery power off circuit. Learn what this fault indicates and where to begin diagnosis.P0A28Hybrid/EV Battery Power Off Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A28 concerns hybrid/ev battery power off circuit low. Learn what this fault indicates and where to begin diagnosis.P0A29Hybrid/EV Battery Power Off Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A29 concerns hybrid/ev battery power off circuit high. Learn what this fault indicates and where to begin diagnosis.P0A2ADrive Motor A Temperature Sensor A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2A concerns drive motor a temperature sensor a circuit. Learn what this fault indicates and where to begin diagnosis.P0A2BDrive Motor A Temperature Sensor A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2B concerns drive motor a temperature sensor a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A2CDrive Motor A Temperature Sensor A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2C concerns drive motor a temperature sensor a circuit low. Learn what this fault indicates and where to begin diagnosis.P0A2DDrive Motor A Temperature Sensor A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2D concerns drive motor a temperature sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.P0A2EDrive Motor A Temperature Sensor A Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2E concerns drive motor a temperature sensor a circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A2FDrive Motor A Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A2F concerns drive motor a over temperature. Learn what this fault indicates and where to begin diagnosis.P0A30Drive Motor B Temperature Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A30 concerns drive motor b temperature sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0A31Drive Motor B Temperature Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A31 concerns drive motor b temperature sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0A32Drive Motor B Temperature Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A32 concerns drive motor b temperature sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0A33Drive Motor B Temperature Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A33 concerns drive motor b temperature sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0A34Drive Motor B Temperature Sensor Circuit IntermittentCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A34 concerns drive motor b temperature sensor circuit intermittent. Learn what this fault indicates and where to begin diagnosis.P0A35Drive Motor B Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A35 concerns drive motor b over temperature. Learn what this fault indicates and where to begin diagnosis.P0A36Generator Temperature Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0A36 concerns generator temperature sensor circuit. Learn what this fault indicates and where to begin diagnosis.