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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.

P · Powertrain Clear all

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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

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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 1945–1968 of 7353

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P0850Park/Neutral Switch Input CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0850 relates to park/neutral switch input circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0851Park/Neutral Switch Input Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0851 relates to park/neutral switch input circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0852Park/Neutral Switch Input Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0852 relates to park/neutral switch input circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0853Drive Switch Input CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0853 relates to drive switch input circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0854Drive Switch Input Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0854 relates to drive switch input circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0855Drive Switch Input Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0855 relates to drive switch input circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0856Traction Control Input SignalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0856 relates to traction control input signal. Check the fault conditions and vehicle-specific procedure before replacing parts.P0857Traction Control Input Signal Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0857 relates to traction control input signal range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0858Traction Control Input Signal LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0858 relates to traction control input signal low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0859Traction Control Input Signal HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0859 relates to traction control input signal high. Check the fault conditions and vehicle-specific procedure before replacing parts.P085AGear Shift Control Module B Communication CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP085A relates to gear shift control module b communication circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P085BGear Shift Control Module B Communication Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP085B relates to gear shift control module b communication circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P085CGear Shift Control Module B Communication Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP085C relates to gear shift control module b communication circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P085DGear Shift Control Module A PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP085D relates to gear shift control module a performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P085EGear Shift Control Module B PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP085E relates to gear shift control module b performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P085FUp and Down Shift Switch Circuit Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP085F relates to up and down shift switch circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0860Gear Shift Control Module A Communication CircuitCheck soonTransmission Issues30–120 minutes for initial diagnosisP0860 relates to gear shift control module a communication circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0861Gear Shift Control Module A Communication Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP0861 relates to gear shift control module a communication circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0862Gear Shift Control Module A Communication Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP0862 relates to gear shift control module a communication circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0863TCM Communication CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0863 relates to tcm communication circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0864TCM Communication Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0864 relates to tcm communication circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0865TCM Communication Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0865 relates to tcm communication circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0866TCM Communication Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0866 relates to tcm communication circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0867Transmission Fluid PressureCheck soonTransmission Issues30–120 minutes for initial diagnosisP0867 relates to transmission fluid pressure. Check the fault conditions and vehicle-specific procedure before replacing parts.