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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.

Check soon P · Powertrain Clear all

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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 1–24 of 6682

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P0069Manifold Absolute Pressure–Barometric Pressure CorrelationCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0069 means Manifold Absolute Pressure–Barometric Pressure Correlation. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0089Fuel Pressure Regulator 1 PerformanceCheck soonFuel System45–120 minutes for initial diagnosisP0089 means Fuel Pressure Regulator 1 Performance. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0128Coolant Thermostat Below Regulating TemperatureCheck soonEngine Problems30–75 minutesDiagnose P0128 thermostat code. Learn why your engine isn't reaching operating temperature.P0171System Too Lean Bank 1 - Complete GuideCheck soonFuel System45–120 minutesDiagnose and fix P0171 system too lean code. Understand what causes a lean fuel mixture and how to solve it with our comprehensive guide.P0221Throttle/Pedal Position Sensor/Switch B Circuit Range/PerformanceCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0221 means Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0235Turbocharger/Supercharger Boost Sensor A CircuitCheck soonSensors & Electronics45–120 minutes for initial diagnosisP0235 means Turbocharger/Supercharger Boost Sensor A Circuit. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0756Shift Solenoid B Performance or Stuck OffCheck soonTransmission Issues45–120 minutes for initial diagnosisP0756 means Shift Solenoid B Performance or Stuck Off. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0760Shift Solenoid C MalfunctionCheck soonTransmission Issues45–120 minutes for initial diagnosisP0760 means Shift Solenoid C Malfunction. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0005Fuel Shutoff Valve A Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP0005 relates to fuel shutoff valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0006Fuel Shutoff Valve A Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0006 relates to fuel shutoff valve a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0007Fuel Shutoff Valve A Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0007 relates to fuel shutoff valve a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0008Engine Position System Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP0008 relates to engine position system performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0009Engine Position System Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP0009 relates to engine position system performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P000AA Camshaft Position Slow Response Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP000A relates to a camshaft position slow response bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P000BB Camshaft Position Slow Response Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP000B relates to b camshaft position slow response bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P000CA Camshaft Position Slow Response Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP000C relates to a camshaft position slow response bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P000DB Camshaft Position Slow Response Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP000D relates to b camshaft position slow response bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P000EFuel Volume Regulator Control Exceeded Learning LimitCheck soonFuel System30–120 minutes for initial diagnosisP000E relates to fuel volume regulator control exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P000FFuel System Over Pressure Relief Valve ActivatedCheck soonFuel System30–120 minutes for initial diagnosisP000F relates to fuel system over pressure relief valve activated. Check the fault conditions and vehicle-specific procedure before replacing parts.P001AA Camshaft Profile Actuator A Control Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001A relates to a camshaft profile actuator a control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001BA Camshaft Profile Actuator A Control Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001B relates to a camshaft profile actuator a control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001CA Camshaft Profile Actuator A Control Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP001C relates to a camshaft profile actuator a control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P001DA Camshaft Profile Actuator A Control Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP001D relates to a camshaft profile actuator a control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P001EA Camshaft Profile Actuator A Control Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP001E relates to a camshaft profile actuator a control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.