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 Urgent P · Powertrain 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 1–24 of 200

Most searched first

P0563System Voltage HighUrgentElectrical & Charging System1–3 hours for initial diagnosisP0563 means System Voltage High. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0A0AHigh Voltage System Interlock Circuit AUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0A concerns high voltage system interlock circuit a. Learn what this fault indicates and where to begin diagnosis.P0A0BHigh Voltage System Interlock Circuit A PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0B concerns high voltage system interlock circuit a performance. Learn what this fault indicates and where to begin diagnosis.P0A0CHigh Voltage System Interlock Circuit A LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0C concerns high voltage system interlock circuit a low. Learn what this fault indicates and where to begin diagnosis.P0A0DHigh Voltage System Interlock Circuit A HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0D concerns high voltage system interlock circuit a high. Learn what this fault indicates and where to begin diagnosis.P0A0EHigh Voltage System Interlock Circuit A IntermittentUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A0E concerns high voltage system interlock circuit a intermittent. Learn what this fault indicates and where to begin diagnosis.P0A7DHybrid/EV Battery Pack State of Charge LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A7D concerns hybrid/ev battery pack state of charge low. Learn what this fault indicates and where to begin diagnosis.P0A7EHybrid/EV Battery Pack A Over TemperatureUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A7E concerns hybrid/ev battery pack a over temperature. Learn what this fault indicates and where to begin diagnosis.P0A7FHybrid/EV Battery Pack A DeteriorationUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A7F concerns hybrid/ev battery pack a deterioration. Learn what this fault indicates and where to begin diagnosis.P0A80Replace Hybrid/EV Battery PackUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A80 concerns replace hybrid/ev battery pack. Learn what this fault indicates and where to begin diagnosis.P0A81Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A81 concerns hybrid/ev battery pack cooling fan 1 control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0A82Hybrid/EV Battery Pack Cooling Fan 1 Performance/Stuck OffUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A82 concerns hybrid/ev battery pack cooling fan 1 performance/stuck off. Learn what this fault indicates and where to begin diagnosis.P0A83Hybrid/EV Battery Pack Cooling Fan 1 Stuck OnUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A83 concerns hybrid/ev battery pack cooling fan 1 stuck on. Learn what this fault indicates and where to begin diagnosis.P0A84Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A84 concerns hybrid/ev battery pack cooling fan 1 control circuit low. Learn what this fault indicates and where to begin diagnosis.P0A85Hybrid/EV Battery Pack Cooling Fan 1 Control Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A85 concerns hybrid/ev battery pack cooling fan 1 control circuit high. Learn what this fault indicates and where to begin diagnosis.P0A95High Voltage Fuse AUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A95 concerns high voltage fuse a. Learn what this fault indicates and where to begin diagnosis.P0A96Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A96 concerns hybrid/ev battery pack cooling fan 2 control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0A97Hybrid/EV Battery Pack Cooling Fan 2 Performance/Stuck OffUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A97 concerns hybrid/ev battery pack cooling fan 2 performance/stuck off. Learn what this fault indicates and where to begin diagnosis.P0A98Hybrid/EV Battery Pack Cooling Fan 2 Stuck OnUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A98 concerns hybrid/ev battery pack cooling fan 2 stuck on. Learn what this fault indicates and where to begin diagnosis.P0A99Hybrid/EV Battery Pack Cooling Fan 2 Control Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A99 concerns hybrid/ev battery pack cooling fan 2 control circuit low. Learn what this fault indicates and where to begin diagnosis.P0A9AHybrid/EV Battery Pack Cooling Fan 2 Control Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0A9A concerns hybrid/ev battery pack cooling fan 2 control circuit high. Learn what this fault indicates and where to begin diagnosis.P0AA6Hybrid/EV Battery Voltage System Isolation FaultUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AA6 concerns hybrid/ev battery voltage system isolation fault. Learn what this fault indicates and where to begin diagnosis.P0AA7Hybrid/EV Battery Voltage Isolation Sensor CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AA7 concerns hybrid/ev battery voltage isolation sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0AA8Hybrid/EV Battery Voltage Isolation Sensor Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AA8 concerns hybrid/ev battery voltage isolation sensor circuit range/performance. Learn what this fault indicates and where to begin diagnosis.