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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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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 265–288 of 1939

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P036DIgnition H Control Signal Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP036D relates to ignition h control signal circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P036EIgnition H Control Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP036E relates to ignition h control signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P036FIgnition H Control Signal Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP036F relates to ignition h control signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P037AGlow Plug/Heater Indicator Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP037A relates to glow plug/heater indicator control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P037BGlow Plug/Heater Indicator Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP037B relates to glow plug/heater indicator control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P037DGlow Plug Sense CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP037D relates to glow plug sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P037EGlow Plug Sense Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP037E relates to glow plug sense circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P037FGlow Plug Sense Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP037F relates to glow plug sense circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0380Glow Plug/Heater Circuit ACheck soonSensors & Electronics30–120 minutes for initial diagnosisP0380 relates to glow plug/heater circuit a. Check the fault conditions and vehicle-specific procedure before replacing parts.P0381Glow Plug/Heater Indicator Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0381 relates to glow plug/heater indicator control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0382Glow Plug/Heater Circuit BCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0382 relates to glow plug/heater circuit b. Check the fault conditions and vehicle-specific procedure before replacing parts.P0383Glow Plug Control Module 1 Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0383 relates to glow plug control module 1 control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0384Glow Plug Control Module 1 Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0384 relates to glow plug control module 1 control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P038AIgnition I Control Signal Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038A relates to ignition i control signal circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P038BIgnition I Control Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038B relates to ignition i control signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P038CIgnition I Control Signal Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038C relates to ignition i control signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P038DIgnition J Control Signal Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038D relates to ignition j control signal circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P038EIgnition J Control Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038E relates to ignition j control signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P038FIgnition J Control Signal Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP038F relates to ignition j control signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P03FAIgnition K Control Signal Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP03FA relates to ignition k control signal circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P03FBIgnition K Control Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP03FB relates to ignition k control signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P03FCIgnition K Control Signal Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP03FC relates to ignition k control signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P03FDIgnition L Control Signal Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP03FD relates to ignition l control signal circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P03FEIgnition L Control Signal Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP03FE relates to ignition l control signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.