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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.

Check soon P · Powertrain 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

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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 1633–1656 of 6682

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P07FFCold Start Transmission PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP07FF relates to cold start transmission performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0800Transfer Case Control System (MIL Request)Check soonTransmission Issues30–120 minutes for initial diagnosisP0800 relates to transfer case control system (mil request). Check the fault conditions and vehicle-specific procedure before replacing parts.P0801Reverse Inhibit Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0801 relates to reverse inhibit control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0802Transmission Control System MIL Request Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP0802 relates to transmission control system mil request circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0803Upshift/Skip Shift Solenoid Control CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0803 relates to upshift/skip shift solenoid control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0804Upshift/Skip Shift Lamp Control CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0804 relates to upshift/skip shift lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0805Clutch Position Sensor A CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0805 relates to clutch position sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0806Clutch Position Sensor A Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP0806 relates to clutch position sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0807Clutch Position Sensor A Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP0807 relates to clutch position sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0808Clutch Position Sensor A Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP0808 relates to clutch position sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0809Clutch Position Sensor A Circuit IntermittentCheck soonTransmission Issues30–120 minutes for initial diagnosisP0809 relates to clutch position sensor a circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P080AClutch Position Not LearnedCheck soonTransmission Issues30–120 minutes for initial diagnosisP080A relates to clutch position not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.P080BUpshift/Skip Shift Solenoid Control Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP080B relates to upshift/skip shift solenoid control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P080CUpshift/Skip Shift Solenoid Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP080C relates to upshift/skip shift solenoid control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P080DUpshift/Skip Shift Solenoid Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP080D relates to upshift/skip shift solenoid control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0810Clutch Position Control ErrorCheck soonTransmission Issues30–120 minutes for initial diagnosisP0810 relates to clutch position control error. Check the fault conditions and vehicle-specific procedure before replacing parts.P0811Excessive Clutch A SlippageCheck soonTransmission Issues30–120 minutes for initial diagnosisP0811 relates to excessive clutch a slippage. Check the fault conditions and vehicle-specific procedure before replacing parts.P0812Reverse Input CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0812 relates to reverse input circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0813Reverse Output CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0813 relates to reverse output circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0814Transmission Range Display CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0814 relates to transmission range display circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0815Upshift Switch CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0815 relates to upshift switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0816Downshift Switch CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0816 relates to downshift switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0817Starter Disable Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0817 relates to starter disable circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0818Driveline Disconnect Switch Input CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0818 relates to driveline disconnect switch input circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.