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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

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

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

Vehicle coverage

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

Diagnostic codes

Showing 1081–1104 of 9253

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P020BCylinder 2 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020B relates to cylinder 2 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020CCylinder 3 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020C relates to cylinder 3 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020DCylinder 4 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020D relates to cylinder 4 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020ECylinder 5 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020E relates to cylinder 5 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P020FCylinder 6 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP020F relates to cylinder 6 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P0219Engine Overspeed ConditionUrgentEngine Problems1–3 hours for initial diagnosisP0219 means Engine Overspeed Condition. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P021ACylinder 7 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021A relates to cylinder 7 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P021BCylinder 8 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021B relates to cylinder 8 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P021CCylinder 9 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021C relates to cylinder 9 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P021DCylinder 10 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021D relates to cylinder 10 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P021ECylinder 11 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021E relates to cylinder 11 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P021FCylinder 12 Injection TimingCheck soonFuel System30–120 minutes for initial diagnosisP021F relates to cylinder 12 injection timing. Check the fault conditions and vehicle-specific procedure before replacing parts.P0220Throttle/Pedal Position Sensor/Switch B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0220 relates to throttle/pedal position sensor/switch b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0222Throttle/Pedal Position Sensor/Switch B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0222 relates to throttle/pedal position sensor/switch b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022ACharge Air Cooler Bypass Control A Circuit /OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022A relates to charge air cooler bypass control a circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P022BCharge Air Cooler Bypass Control A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022B relates to charge air cooler bypass control a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022CCharge Air Cooler Bypass Control A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022C relates to charge air cooler bypass control a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P022DCharge Air Cooler Bypass Control B Circuit /OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022D relates to charge air cooler bypass control b circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P022ECharge Air Cooler Bypass Control B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022E relates to charge air cooler bypass control b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P022FCharge Air Cooler Bypass Control B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP022F relates to charge air cooler bypass control b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0230Fuel Pump Primary Circuit MalfunctionFuel SystemFix P0230 fuel pump primary circuit code - relay, wiring, and fuel pump control module causes and solutions.P0234Turbocharger/Supercharger A Overboost ConditionUrgentEngine Problems1–3 hours for initial diagnosisP0234 means Turbocharger/Supercharger A Overboost Condition. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0236Turbocharger/Supercharger Boost Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0236 relates to turbocharger/supercharger boost sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0237Turbocharger/Supercharger Boost Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0237 relates to turbocharger/supercharger boost sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.