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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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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 1513–1536 of 1939

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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.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.P271APark Pawl Position Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP271A relates to park pawl position sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P271BPark Pawl Position Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP271B relates to park pawl position sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P271CPark Pawl Position Sensor B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP271C relates to park pawl position sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P271DPark Pawl Position Sensor B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP271D relates to park pawl position sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P272CPark Pawl Motor Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP272C relates to park pawl motor control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P272DPark Pawl Motor Control Circuit Current Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP272D relates to park pawl motor control circuit current too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2745Intermediate Shaft Speed Sensor B CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2745 relates to intermediate shaft speed sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2746Intermediate Shaft Speed Sensor B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2746 relates to intermediate shaft speed sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.