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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

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All severities9253 Low priority305 Check soon8256 Urgent621

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All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 145–168 of 7353

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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.P00B9Low Pressure Fuel System Pressure - Too Low. Low Ambient TemperatureCheck soonFuel System30–120 minutes for initial diagnosisP00B9 relates to low pressure fuel system pressure - too low. low ambient temperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BALow Fuel Pressure - Forced Limited PowerCheck soonFuel System30–120 minutes for initial diagnosisP00BA relates to low fuel pressure - forced limited power. Check the fault conditions and vehicle-specific procedure before replacing parts.P00BBFuel Injector Insufficient Flow - Forced Limited PowerCheck soonFuel System30–120 minutes for initial diagnosisP00BB relates to fuel injector insufficient flow - forced limited power. 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.P00C6Fuel Rail Pressure Too Low - Engine Cranking Bank 1Check soonFuel System30–120 minutes for initial diagnosisP00C6 relates to fuel rail pressure too low - engine cranking bank 1. 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.P00C8Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP00C8 relates to fuel pressure regulator a solenoid supply voltage control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P00C9Fuel Pressure Regulator A Solenoid Supply Voltage Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP00C9 relates to fuel pressure regulator a solenoid supply voltage control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CAFuel Pressure Regulator A Solenoid Supply Voltage Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP00CA relates to fuel pressure regulator a solenoid supply voltage control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CBFuel Volume Regulator Solenoid Supply Voltage Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP00CB relates to fuel volume regulator solenoid supply voltage control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CCFuel Volume Regulator Solenoid Supply Voltage Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP00CC relates to fuel volume regulator solenoid supply voltage control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P00CDFuel Volume Regulator Solenoid Supply Voltage Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP00CD relates to fuel volume regulator solenoid supply voltage control circuit high. 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.