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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.

Sensors & Electronics 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 2110

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P269DExhaust Aftertreatment Glow Plug Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269D relates to exhaust aftertreatment glow plug control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P269EExhaust Aftertreatment Glow Plug Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269E relates to exhaust aftertreatment glow plug control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P269FExhaust Aftertreatment Glow Plug Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP269F relates to exhaust aftertreatment glow plug circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A0Exhaust Aftertreatment Glow Plug PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A0 relates to exhaust aftertreatment glow plug performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A1Exhaust Aftertreatment Glow Plug Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A1 relates to exhaust aftertreatment glow plug circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26A2Exhaust Aftertreatment Glow Plug Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26A2 relates to exhaust aftertreatment glow plug circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C5Exhaust Flow Control Valve A Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C5 relates to exhaust flow control valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C6Exhaust Flow Control Valve A Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C6 relates to exhaust flow control valve a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C7Exhaust Flow Control Valve A Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C7 relates to exhaust flow control valve a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C8Chassis Control Module 1 Requested MIL IlluminationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C8 relates to chassis control module 1 requested mil illumination. Check the fault conditions and vehicle-specific procedure before replacing parts.P26C9Chassis Control Module 2 Requested MIL IlluminationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26C9 relates to chassis control module 2 requested mil illumination. Check the fault conditions and vehicle-specific procedure before replacing parts.P26DBEngine Sound Control A Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26DB relates to engine sound control a circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26DCEngine Sound Control A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26DC relates to engine sound control a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26DDEngine Sound Control A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26DD relates to engine sound control a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26DEEngine Sound Control A Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26DE relates to engine sound control a circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26ECEngine Sound Control B Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26EC relates to engine sound control b circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26EDEngine Sound Control B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26ED relates to engine sound control b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26EEEngine Sound Control B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26EE relates to engine sound control b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26EFEngine Sound Control B Circuit PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26EF relates to engine sound control b circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FDA/C Compressor Internal Control Module PerformanceLow prioritySensors & Electronics30–120 minutes for initial diagnosisP26FD relates to a/c compressor internal control module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FEExhaust Flow Control Valve A Control PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP26FE relates to exhaust flow control valve a control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FFAuto Configuration Throttle Input Not Present Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP26FF relates to auto configuration throttle input not present bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2711Unexpected Mechanical Gear DisengagementCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2711 relates to unexpected mechanical gear disengagement. Check the fault conditions and vehicle-specific procedure before replacing parts.P2712Hydraulic Power Unit LeakageCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2712 relates to hydraulic power unit leakage. Check the fault conditions and vehicle-specific procedure before replacing parts.