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.

Urgent 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 385–408 of 621

Most searched first

P0AB1Hybrid/EV Battery Pack Air Temperature Sensor B CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AB1 concerns hybrid/ev battery pack air temperature sensor b circuit. Learn what this fault indicates and where to begin diagnosis.P0AB2Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AB2 concerns hybrid/ev battery pack air temperature sensor b circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0AB3Hybrid/EV Battery Pack Air Temperature Sensor B Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AB3 concerns hybrid/ev battery pack air temperature sensor b circuit low. Learn what this fault indicates and where to begin diagnosis.P0AB4Hybrid/EV Battery Pack Air Temperature Sensor B Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AB4 concerns hybrid/ev battery pack air temperature sensor b circuit high. Learn what this fault indicates and where to begin diagnosis.P0AB5Hybrid/EV Battery Pack Air Temperature Sensor B Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AB5 concerns hybrid/ev battery pack air temperature sensor b circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0ABAHybrid/EV Battery Pack Voltage Sense A CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABA concerns hybrid/ev battery pack voltage sense a circuit. Learn what this fault indicates and where to begin diagnosis.P0ABBHybrid/EV Battery Pack Voltage Sense A Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABB concerns hybrid/ev battery pack voltage sense a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0ABCHybrid/EV Battery Pack Voltage Sense A Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABC concerns hybrid/ev battery pack voltage sense a circuit low. Learn what this fault indicates and where to begin diagnosis.P0ABDHybrid/EV Battery Pack Voltage Sense A Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABD concerns hybrid/ev battery pack voltage sense a circuit high. Learn what this fault indicates and where to begin diagnosis.P0ABEHybrid/EV Battery Pack Voltage Sense A Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABE concerns hybrid/ev battery pack voltage sense a circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0ABFHybrid/EV Battery Pack Current Sensor A CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ABF concerns hybrid/ev battery pack current sensor a circuit. Learn what this fault indicates and where to begin diagnosis.P0AC0Hybrid/EV Battery Pack Current Sensor A Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AC0 concerns hybrid/ev battery pack current sensor a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0AC1Hybrid/EV Battery Pack Current Sensor A Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AC1 concerns hybrid/ev battery pack current sensor a circuit low. Learn what this fault indicates and where to begin diagnosis.P0AC2Hybrid/EV Battery Pack Current Sensor A Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AC2 concerns hybrid/ev battery pack current sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.P0AC3Hybrid/EV Battery Pack Current Sensor A Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AC3 concerns hybrid/ev battery pack current sensor a circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0ACFHybrid/EV Battery Pack Cooling Fan 3 Control Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0ACF concerns hybrid/ev battery pack cooling fan 3 control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0AD0Hybrid/EV Battery Pack Cooling Fan 3 Performance/Stuck OffUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD0 concerns hybrid/ev battery pack cooling fan 3 performance/stuck off. Learn what this fault indicates and where to begin diagnosis.P0AD1Hybrid/EV Battery Pack Cooling Fan 3 Stuck OnUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD1 concerns hybrid/ev battery pack cooling fan 3 stuck on. Learn what this fault indicates and where to begin diagnosis.P0AD2Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD2 concerns hybrid/ev battery pack cooling fan 3 control circuit low. Learn what this fault indicates and where to begin diagnosis.P0AD3Hybrid/EV Battery Pack Cooling Fan 3 Control Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD3 concerns hybrid/ev battery pack cooling fan 3 control circuit high. Learn what this fault indicates and where to begin diagnosis.P0AD4Hybrid/EV Battery Pack Air Flow System Insufficient Air FlowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD4 concerns hybrid/ev battery pack air flow system insufficient air flow. Learn what this fault indicates and where to begin diagnosis.P0AD5Hybrid/EV Battery Pack Air Flow Valve A Control Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD5 concerns hybrid/ev battery pack air flow valve a control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0AD6Hybrid/EV Battery Pack Air Flow Valve A Control Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD6 concerns hybrid/ev battery pack air flow valve a control circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0AD7Hybrid/EV Battery Pack Air Flow Valve A Control Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0AD7 concerns hybrid/ev battery pack air flow valve a control circuit low. Learn what this fault indicates and where to begin diagnosis.