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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 409–432 of 975

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P217DFuel Injector Group H Supply Voltage Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP217D relates to fuel injector group h supply voltage circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P217EFuel Injector Group H Supply Voltage Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP217E relates to fuel injector group h supply voltage circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P217FFuel Injector Group H Supply Voltage Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP217F relates to fuel injector group h supply voltage circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P218BThrottle/Fuel Inhibit B CircuitCheck soonFuel System30–120 minutes for initial diagnosisP218B relates to throttle/fuel inhibit b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P218CThrottle/Fuel Inhibit B Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP218C relates to throttle/fuel inhibit b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P218DThrottle/Fuel Inhibit B Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP218D relates to throttle/fuel inhibit b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P218EThrottle/Fuel Inhibit B Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP218E relates to throttle/fuel inhibit b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P219ABank 1 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219A relates to bank 1 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P219BBank 2 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219B relates to bank 2 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P219CCylinder 1 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219C relates to cylinder 1 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P219DCylinder 2 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219D relates to cylinder 2 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P219ECylinder 3 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219E relates to cylinder 3 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P219FCylinder 4 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP219F relates to cylinder 4 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A0Cylinder 5 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A0 relates to cylinder 5 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A1Cylinder 6 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A1 relates to cylinder 6 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A2Cylinder 7 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A2 relates to cylinder 7 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A3Cylinder 8 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A3 relates to cylinder 8 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A4Cylinder 9 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A4 relates to cylinder 9 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A5Cylinder 10 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A5 relates to cylinder 10 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A6Cylinder 11 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A6 relates to cylinder 11 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21A7Cylinder 12 Air-Fuel Ratio ImbalanceCheck soonFuel System30–120 minutes for initial diagnosisP21A7 relates to cylinder 12 air-fuel ratio imbalance. Check the fault conditions and vehicle-specific procedure before replacing parts.P21B6Cold Start Cylinder 1 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP21B6 relates to cold start cylinder 1 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P21B7Cold Start Cylinder 2 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP21B7 relates to cold start cylinder 2 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P21B8Cold Start Cylinder 3 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP21B8 relates to cold start cylinder 3 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.