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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.

Fuel System 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

Code family

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 1016

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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.P0093Fuel System Leak Detected — Large LeakUrgentFuel System1–3 hours for initial diagnosisP0093 means Fuel System Leak Detected — Large Leak. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.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.P0172System Too Rich Bank 1 - Causes & SolutionsFuel SystemDiagnose P0172 rich fuel mixture code. Learn what causes excess fuel in the air-fuel mixture and how to fix it.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.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.P0087Fuel Rail/System Pressure Too Low - Causes & FixesFuel SystemUnderstand P0087 fuel rail pressure too low code - common causes like a failing fuel pump or clogged filter, and how to fix it.P0088Fuel Rail/System Pressure - Too High Bank 1Check soonFuel System30–120 minutes for initial diagnosisP0088 relates to fuel rail/system pressure - too high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P008ALow Pressure Fuel System Pressure - Too LowCheck soonFuel System30–120 minutes for initial diagnosisP008A relates to low pressure fuel system pressure - too low. Check the fault conditions and vehicle-specific procedure before replacing parts.P008BLow Pressure Fuel System Pressure - Too HighCheck soonFuel System30–120 minutes for initial diagnosisP008B relates to low pressure fuel system pressure - too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P008CFuel Cooler Pump Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP008C relates to fuel cooler pump control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P008DFuel Cooler Pump Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP008D relates to fuel cooler pump control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P008EFuel Cooler Pump Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP008E relates to fuel cooler pump control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P008FEngine Coolant Temperature/Fuel Temperature CorrelationCheck soonFuel System30–120 minutes for initial diagnosisP008F relates to engine coolant temperature/fuel temperature correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P0090Fuel Pressure Regulator 1 Control CircuitCheck soonFuel System45–120 minutes for initial diagnosisP0090 means Fuel Pressure Regulator 1 Control Circuit. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P009BFuel Pressure Relief Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP009B relates to fuel pressure relief control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P009CFuel Pressure Relief Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP009C relates to fuel pressure relief control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P009DFuel Pressure Relief Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP009D relates to fuel pressure relief control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P009EFuel Pressure Relief Control Performance/Stuck OffCheck soonFuel System30–120 minutes for initial diagnosisP009E relates to fuel pressure relief control performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P009FFuel Pressure Relief Control Stuck OnCheck soonFuel System30–120 minutes for initial diagnosisP009F relates to fuel pressure relief control stuck on. 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.