Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

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.

Transmission Issues P · Powertrain Clear all

Quick browse

Choose a vehicle system

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 169–192 of 866

Most searched first

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.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.P0819Up and Down Shift Switch to Transmission Range CorrelationCheck soonTransmission Issues30–120 minutes for initial diagnosisP0819 relates to up and down shift switch to transmission range correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P081EExcessive Clutch B SlippageCheck soonTransmission Issues30–120 minutes for initial diagnosisP081E relates to excessive clutch b slippage. Check the fault conditions and vehicle-specific procedure before replacing parts.P081FBrake Transmission Shift Interlock (BTSI) Signal CorrelationCheck soonTransmission Issues30–120 minutes for initial diagnosisP081F relates to brake transmission shift interlock (btsi) signal correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P0825Gear Lever Push-Pull Switch (Shift Anticipate)Check soonTransmission Issues30–120 minutes for initial diagnosisP0825 relates to gear lever push-pull switch (shift anticipate). Check the fault conditions and vehicle-specific procedure before replacing parts.P0826Up and Down Shift Switch CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0826 relates to up and down shift switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0827Up and Down Shift Switch Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP0827 relates to up and down shift switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0828Up and Down Shift Switch Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP0828 relates to up and down shift switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.