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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.

Check soon 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 4753–4776 of 6682

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P26E8Actuator Supply Voltage D Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E8 relates to actuator supply voltage d circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E9Actuator Supply Voltage D Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E9 relates to actuator supply voltage d circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26EAFuel Pump Control Module BCheck soonFuel System30–120 minutes for initial diagnosisP26EA relates to fuel pump control module b. Check the fault conditions and vehicle-specific procedure before replacing parts.P26EBAlternative Fuel Control Module System VoltageCheck soonFuel System30–120 minutes for initial diagnosisP26EB relates to alternative fuel control module system voltage. 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.P26F0Starter Relay A Stuck OnCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26F0 relates to starter relay a stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F1Starter Relay A Stuck OffCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26F1 relates to starter relay a stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F2Starter Relay B Stuck OnCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26F2 relates to starter relay b stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F3Starter Relay B Stuck OffCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26F3 relates to starter relay b stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F4Coolant Pump C Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP26F4 relates to coolant pump c control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F5Coolant Pump C Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP26F5 relates to coolant pump c control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F6Coolant Pump C Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP26F6 relates to coolant pump c control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F7Coolant Pump C Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26F7 relates to coolant pump c supply voltage circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F8Coolant Pump C Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP26F8 relates to coolant pump c stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P26F9Coolant Pump C Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP26F9 relates to coolant pump c control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FBEGR Cooler Bypass Control Stuck Closed Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP26FB relates to egr cooler bypass control stuck closed bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FCEGR Cooler Bypass Control Stuck Closed Bank 2Check soonEmissions System30–120 minutes for initial diagnosisP26FC relates to egr cooler bypass control stuck closed bank 2. 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.P2700Transmission Friction Element A Apply Time Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP2700 relates to transmission friction element a apply time range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2701Transmission Friction Element B Apply Time Range/PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP2701 relates to transmission friction element b apply time range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.