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.

Sensors & Electronics 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 73–96 of 2110

Most searched first

P00B0Turbocharger/Supercharger Boost Control B Module PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00B0 relates to turbocharger/supercharger boost control b module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P00B8MAP - Mass or Volume Air Flow Correlation Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP00B8 relates to map - mass or volume air flow correlation bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BCMass or Volume Air Flow A Circuit Range/Performance - Air Flow Too LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00BC relates to mass or volume air flow a circuit range/performance - air flow too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BDMass or Volume Air Flow A Circuit Range/Performance - Air Flow Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00BD relates to mass or volume air flow a circuit range/performance - air flow too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BEMass or Volume Air Flow B Circuit Range/Performance - Air Flow Too LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00BE relates to mass or volume air flow b circuit range/performance - air flow too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BFMass or Volume Air Flow B Circuit Range/Performance - Air Flow Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00BF relates to mass or volume air flow b circuit range/performance - air flow too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C0Turbocharger/Supercharger Bypass Valve B Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00C0 relates to turbocharger/supercharger bypass valve b control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C1Turbocharger/Supercharger Bypass Valve B Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00C1 relates to turbocharger/supercharger bypass valve b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C2Turbocharger/Supercharger Bypass Valve B Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00C2 relates to turbocharger/supercharger bypass valve b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C3Turbocharger/Supercharger Bypass Valve B Control Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00C3 relates to turbocharger/supercharger bypass valve b control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C4Turbocharger/Supercharger Bypass Valve B - MechanicalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00C4 relates to turbocharger/supercharger bypass valve b - mechanical. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C5Turbocharger/Supercharger B Turbine OverspeedUrgentSensors & Electronics30–120 minutes for initial diagnosisP00C5 relates to turbocharger/supercharger b turbine overspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C7Intake Air Pressure Measurement System - Multiple Sensor Correlation Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP00C7 relates to intake air pressure measurement system - multiple sensor correlation bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CEIntake Air Temperature Measurement System - Multiple Sensor Correlation Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP00CE relates to intake air temperature measurement system - multiple sensor correlation bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CFBarometric Pressure - Turbocharger/Supercharger Boost Sensor A CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00CF relates to barometric pressure - turbocharger/supercharger boost sensor a correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D0Barometric Pressure - Turbocharger/Supercharger Boost Sensor B CorrelationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00D0 relates to barometric pressure - turbocharger/supercharger boost sensor b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D1HO2S Heater Control Circuit Range/Performance Bank 1 Sensor 1Low prioritySensors & Electronics30–120 minutes for initial diagnosisP00D1 relates to ho2s heater control circuit range/performance bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D2HO2S Heater Control Circuit Range/Performance Bank 1 Sensor 2Low prioritySensors & Electronics30–120 minutes for initial diagnosisP00D2 relates to ho2s heater control circuit range/performance bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D3HO2S Heater Control Circuit Range/Performance Bank 2 Sensor 1Low prioritySensors & Electronics30–120 minutes for initial diagnosisP00D3 relates to ho2s heater control circuit range/performance bank 2 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D4HO2S Heater Control Circuit Range/Performance Bank 2 Sensor 2Low prioritySensors & Electronics30–120 minutes for initial diagnosisP00D4 relates to ho2s heater control circuit range/performance bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D5HO2S Sensor Correlation Bank 1 Sensor 1/Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP00D5 relates to ho2s sensor correlation bank 1 sensor 1/bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D6HO2S Sensor Correlation Bank 2 Sensor 1/Bank 2 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP00D6 relates to ho2s sensor correlation bank 2 sensor 1/bank 2 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D7Turbocharger/Supercharger Bypass Valve A Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00D7 relates to turbocharger/supercharger bypass valve a temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P00D8Turbocharger/Supercharger Bypass Valve B Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00D8 relates to turbocharger/supercharger bypass valve b temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.