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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 97–120 of 1939

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P00FCTurbocharger Outlet Pressure Sensor A Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00FC relates to turbocharger outlet pressure sensor a intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P00FFBody Control Module Requested MIL IlluminationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP00FF relates to body control module requested mil illumination. Check the fault conditions and vehicle-specific procedure before replacing parts.P0100Mass or Volume Air Flow Circuit MalfunctionCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0100 means Mass or Volume Air Flow Circuit Malfunction. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0101MAF Sensor Circuit Range/Performance ProblemCheck soonSensors & Electronics30–90 minutesFix P0101 mass air flow sensor code. Learn how to clean, test, and replace your MAF sensor to restore performance.P0105Manifold Absolute Pressure/Barometric Pressure Circuit MalfunctionCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0105 means Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P010AMass or Volume Air Flow Sensor B CircuitCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010A indicates the control module detected an electrical fault in the secondary mass-air-flow sensor circuit. Learn what to inspect before replacing parts.P010BMass or Volume Air Flow B Circuit Range/PerformanceCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010B means the second MAF signal does not agree with the expected air flow for the current operating conditions. Learn what to check before replacing parts.P010CMass or Volume Air Flow Sensor B Circuit LowCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010C indicates the secondary mass-air-flow sensor signal is lower than its expected electrical range. Learn what to inspect before replacing parts.P010DMass or Volume Air Flow Sensor B Circuit HighCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010D indicates the secondary mass-air-flow sensor signal is higher than its expected electrical range. Learn what to inspect before replacing parts.P010EMass or Volume Air Flow Sensor B Circuit Intermittent/ErraticCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010E indicates the secondary mass-air-flow sensor signal changes unexpectedly or drops out. Learn what to inspect before replacing parts.P010FMass or Volume Air Flow Sensor A/B CorrelationCheck soonSensors & Electronics30–90 minutes for initial diagnosisP010F indicates the two measured mass-air-flow signals do not agree within the expected range. Learn what to inspect before replacing parts.P0114Intake Air Temperature Sensor 1 Circuit Intermittent Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP0114 relates to intake air temperature sensor 1 circuit intermittent bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0115Engine Coolant Temperature Sensor 1 CircuitCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0115 means Engine Coolant Temperature Sensor 1 Circuit. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P011CCharge Air Cooler Temperature/Intake Air Temperature Correlation Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP011C relates to charge air cooler temperature/intake air temperature correlation bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P011DCharge Air Cooler Temperature/Intake Air Temperature Correlation Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP011D relates to charge air cooler temperature/intake air temperature correlation bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0120Throttle/Pedal Position Sensor/Switch A CircuitCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0120 means Throttle/Pedal Position Sensor/Switch A Circuit. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0127Intake Air Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0127 relates to intake air temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0129Barometric Pressure Too LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0129 relates to barometric pressure too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P012ATurbocharger/Supercharger Inlet Pressure Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP012A relates to turbocharger/supercharger inlet pressure sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P012BTurbocharger/Supercharger Inlet Pressure Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP012B relates to turbocharger/supercharger inlet pressure sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P012CTurbocharger/Supercharger Inlet Pressure Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP012C relates to turbocharger/supercharger inlet pressure sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P012DTurbocharger/Supercharger Inlet Pressure Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP012D relates to turbocharger/supercharger inlet pressure sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P012ETurbocharger/Supercharger Inlet Pressure Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP012E relates to turbocharger/supercharger inlet pressure sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P013AO2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP013A relates to o2 sensor slow response - rich to lean bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.