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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

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 3193–3216 of 9253

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P0B28Hybrid/EV Battery B Voltage UnstableCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B28 concerns hybrid/ev battery b voltage unstable. Learn what this fault indicates and where to begin diagnosis.P0B29Hybrid/EV Battery B Voltage LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B29 concerns hybrid/ev battery b voltage low. Learn what this fault indicates and where to begin diagnosis.P0B2AHybrid/EV Battery B Voltage HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2A concerns hybrid/ev battery b voltage high. Learn what this fault indicates and where to begin diagnosis.P0B2BHybrid/EV Battery C VoltageCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2B concerns hybrid/ev battery c voltage. Learn what this fault indicates and where to begin diagnosis.P0B2CHybrid/EV Battery C Voltage UnstableCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2C concerns hybrid/ev battery c voltage unstable. Learn what this fault indicates and where to begin diagnosis.P0B2DHybrid/EV Battery C Voltage LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2D concerns hybrid/ev battery c voltage low. Learn what this fault indicates and where to begin diagnosis.P0B2EHybrid/EV Battery C Voltage HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2E concerns hybrid/ev battery c voltage high. Learn what this fault indicates and where to begin diagnosis.P0B2FHybrid/EV Battery D VoltageCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B2F concerns hybrid/ev battery d voltage. Learn what this fault indicates and where to begin diagnosis.P0B30Hybrid/EV Battery D Voltage UnstableCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B30 concerns hybrid/ev battery d voltage unstable. Learn what this fault indicates and where to begin diagnosis.P0B31Hybrid/EV Battery D Voltage LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B31 concerns hybrid/ev battery d voltage low. Learn what this fault indicates and where to begin diagnosis.P0B32Hybrid/EV Battery D Voltage HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B32 concerns hybrid/ev battery d voltage high. 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.P0B38Motor Electronics Coolant Pump B Control Circuit/OpenCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B38 concerns motor electronics coolant pump b control circuit/open. Learn what this fault indicates and where to begin diagnosis.P0B39Motor Electronics Coolant Pump B Control Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B39 concerns motor electronics coolant pump b control circuit low. Learn what this fault indicates and where to begin diagnosis.P0B3AMotor Electronics Coolant Pump B Control Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3A concerns motor electronics coolant pump b control circuit high. Learn what this fault indicates and where to begin diagnosis.P0B3BHybrid/EV Battery Voltage Sense A CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3B concerns hybrid/ev battery voltage sense a circuit. Learn what this fault indicates and where to begin diagnosis.P0B3CHybrid/EV Battery Voltage Sense A Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3C concerns hybrid/ev battery voltage sense a circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0B3DHybrid/EV Battery Voltage Sense A Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3D concerns hybrid/ev battery voltage sense a circuit low. Learn what this fault indicates and where to begin diagnosis.P0B3EHybrid/EV Battery Voltage Sense A Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3E concerns hybrid/ev battery voltage sense a circuit high. Learn what this fault indicates and where to begin diagnosis.P0B3FHybrid/EV Battery Voltage Sense A Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0B3F concerns hybrid/ev battery voltage sense a circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.