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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 1177–1200 of 9253

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P0280Cylinder 7 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0280 relates to cylinder 7 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0281Cylinder 7 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0281 relates to cylinder 7 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0282Cylinder 8 Injector A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0282 relates to cylinder 8 injector a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0283Cylinder 8 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0283 relates to cylinder 8 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0284Cylinder 8 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0284 relates to cylinder 8 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0285Cylinder 9 Injector A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0285 relates to cylinder 9 injector a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0286Cylinder 9 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0286 relates to cylinder 9 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0287Cylinder 9 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0287 relates to cylinder 9 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0288Cylinder 10 Injector A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0288 relates to cylinder 10 injector a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0289Cylinder 10 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0289 relates to cylinder 10 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P028ACharge Air Cooler Cooling Fan Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP028A relates to charge air cooler cooling fan control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P028BCharge Air Cooler Cooling Fan Performance/Stuck OffCheck soonEngine Problems30–120 minutes for initial diagnosisP028B relates to charge air cooler cooling fan performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P028CCharge Air Cooler Cooling Fan Stuck OnCheck soonEngine Problems30–120 minutes for initial diagnosisP028C relates to charge air cooler cooling fan stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P028DCharge Air Cooler Cooling Fan Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP028D relates to charge air cooler cooling fan control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P028ECharge Air Cooler Cooling Fan Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP028E relates to charge air cooler cooling fan control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P028FCharge Air Cooler Cooling Fan Control Circuit Driver PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP028F relates to charge air cooler cooling fan control circuit driver performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0290Cylinder 10 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0290 relates to cylinder 10 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0291Cylinder 11 Injector A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0291 relates to cylinder 11 injector a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0292Cylinder 11 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0292 relates to cylinder 11 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0293Cylinder 11 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0293 relates to cylinder 11 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0294Cylinder 12 Injector A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP0294 relates to cylinder 12 injector a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0295Cylinder 12 Injector A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP0295 relates to cylinder 12 injector a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0296Cylinder 12 Contribution/BalanceCheck soonEngine Problems30–120 minutes for initial diagnosisP0296 relates to cylinder 12 contribution/balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0297Vehicle Overspeed ConditionUrgentSensors & Electronics30–120 minutes for initial diagnosisP0297 relates to vehicle overspeed condition. Check the fault conditions and vehicle-specific procedure before replacing parts.