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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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Severity

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 6361–6384 of 9253

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P289CCylinder 4 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP289C relates to cylinder 4 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P289DCylinder 4 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP289D relates to cylinder 4 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P289ECylinder 4 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP289E relates to cylinder 4 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P289FCylinder 4 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP289F relates to cylinder 4 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A0Cylinder 5 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP28A0 relates to cylinder 5 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A1Cylinder 5 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP28A1 relates to cylinder 5 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A2Cylinder 5 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP28A2 relates to cylinder 5 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A3Cylinder 5 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP28A3 relates to cylinder 5 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A4Cylinder 6 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP28A4 relates to cylinder 6 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A5Cylinder 6 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP28A5 relates to cylinder 6 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A6Cylinder 6 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP28A6 relates to cylinder 6 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A7Cylinder 6 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP28A7 relates to cylinder 6 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A8Cylinder 7 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP28A8 relates to cylinder 7 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28A9Cylinder 7 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP28A9 relates to cylinder 7 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28AACylinder 7 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP28AA relates to cylinder 7 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28ABCylinder 7 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP28AB relates to cylinder 7 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P28ACCylinder 8 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP28AC relates to cylinder 8 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28ADCylinder 8 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP28AD relates to cylinder 8 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28AECylinder 8 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP28AE relates to cylinder 8 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28AFCylinder 8 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP28AF relates to cylinder 8 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P28B0Cylinder 9 Ion Current Sense CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP28B0 relates to cylinder 9 ion current sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28B1Cylinder 9 Ion Current Sense Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP28B1 relates to cylinder 9 ion current sense circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28B2Cylinder 9 Ion Current Sense Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP28B2 relates to cylinder 9 ion current sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28B3Cylinder 9 Ion Current Sense Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP28B3 relates to cylinder 9 ion current sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.