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 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 121–144 of 302

Most searched first

P0B1AHybrid/EV Battery Pack Voltage Sense C Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1A concerns hybrid/ev battery pack voltage sense c circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0B1BHybrid/EV Battery Pack Voltage Sense C Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1B concerns hybrid/ev battery pack voltage sense c circuit low. Learn what this fault indicates and where to begin diagnosis.P0B1CHybrid/EV Battery Pack Voltage Sense C Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1C concerns hybrid/ev battery pack voltage sense c circuit high. Learn what this fault indicates and where to begin diagnosis.P0B1DHybrid/EV Battery Pack Voltage Sense C Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1D concerns hybrid/ev battery pack voltage sense c circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0B1EHybrid/EV Battery Pack Voltage Sense D CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1E concerns hybrid/ev battery pack voltage sense d circuit. Learn what this fault indicates and where to begin diagnosis.P0B1FHybrid/EV Battery Pack Voltage Sense D Circuit Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B1F concerns hybrid/ev battery pack voltage sense d circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0B20Hybrid/EV Battery Pack Voltage Sense D Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B20 concerns hybrid/ev battery pack voltage sense d circuit low. Learn what this fault indicates and where to begin diagnosis.P0B21Hybrid/EV Battery Pack Voltage Sense D Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B21 concerns hybrid/ev battery pack voltage sense d circuit high. Learn what this fault indicates and where to begin diagnosis.P0B22Hybrid/EV Battery Pack Voltage Sense D Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B22 concerns hybrid/ev battery pack voltage sense d circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0B33High Voltage Service Disconnect CircuitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B33 concerns high voltage service disconnect circuit. Learn what this fault indicates and where to begin diagnosis.P0B34High Voltage Service Disconnect Circuit PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B34 concerns high voltage service disconnect circuit performance. Learn what this fault indicates and where to begin diagnosis.P0B35High Voltage Service Disconnect Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B35 concerns high voltage service disconnect circuit low. Learn what this fault indicates and where to begin diagnosis.P0B36High Voltage Service Disconnect Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B36 concerns high voltage service disconnect circuit high. Learn what this fault indicates and where to begin diagnosis.P0B37High Voltage Service Disconnect OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0B37 concerns high voltage service disconnect open. Learn what this fault indicates and where to begin diagnosis.P0BBDHybrid/EV Battery Pack Voltage Variation Exceeded LimitUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BBD concerns hybrid/ev battery pack voltage variation exceeded limit. Learn what this fault indicates and where to begin diagnosis.P0BBEHybrid/EV Battery Pack Voltage VariationUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BBE concerns hybrid/ev battery pack voltage variation. Learn what this fault indicates and where to begin diagnosis.P0BBFHybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BBF concerns hybrid/ev battery pack cooling fan supply voltage circuit/open. Learn what this fault indicates and where to begin diagnosis.P0BC0Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BC0 concerns hybrid/ev battery pack cooling fan supply voltage circuit low. Learn what this fault indicates and where to begin diagnosis.P0BC1Hybrid/EV Battery Pack Cooling Fan Supply Voltage Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BC1 concerns hybrid/ev battery pack cooling fan supply voltage circuit high. Learn what this fault indicates and where to begin diagnosis.P0BC7Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit/OpenUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BC7 concerns hybrid/ev battery pack cooling fan 1 sense circuit/open. Learn what this fault indicates and where to begin diagnosis.P0BC8Hybrid/EV Battery Pack Cooling Fan 1 Sense Range/PerformanceUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BC8 concerns hybrid/ev battery pack cooling fan 1 sense range/performance. Learn what this fault indicates and where to begin diagnosis.P0BC9Hybrid/EV Battery Pack Cooling Fan 1 Sense Circuit LowUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BC9 concerns hybrid/ev battery pack cooling fan 1 sense circuit low. Learn what this fault indicates and where to begin diagnosis.P0BCAHybrid/EV Battery Pack Cooling Fan 1 Sense Circuit HighUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BCA concerns hybrid/ev battery pack cooling fan 1 sense circuit high. Learn what this fault indicates and where to begin diagnosis.P0BCBHybrid/EV Battery Pack Cooling Fan 1 Sense Circuit Intermittent/ErraticUrgentElectrical & Charging System45–120 minutes for initial diagnosisP0BCB concerns hybrid/ev battery pack cooling fan 1 sense circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.