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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

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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 5257–5280 of 7353

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P26C4Internal Control Module Clutch Pedal PerformanceCheck soonTransmission Issues30–120 minutes for initial diagnosisP26C4 relates to internal control module clutch pedal performance. 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.P26CAEngine Coolant Pump Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP26CA relates to engine coolant pump control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26CBEngine Coolant Pump Performance/Stuck OffCheck soonEngine Problems30–120 minutes for initial diagnosisP26CB relates to engine coolant pump performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P26CCEngine Coolant Pump Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP26CC relates to engine coolant pump control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26CDEngine Coolant Pump Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP26CD relates to engine coolant pump control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26CEEngine Coolant Pump Overspeed/Air In SystemUrgentEngine Problems30–120 minutes for initial diagnosisP26CE relates to engine coolant pump overspeed/air in system. Check the fault conditions and vehicle-specific procedure before replacing parts.P26CFEngine Coolant Pump Control Module System VoltageCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26CF relates to engine coolant pump control module system voltage. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D0Engine Coolant Pump Control Module System Voltage LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26D0 relates to engine coolant pump control module system voltage low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D1Engine Coolant Pump Control Module System Voltage HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26D1 relates to engine coolant pump control module system voltage high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D2Engine Coolant Pump Control Module Over TemperatureUrgentEngine Problems30–120 minutes for initial diagnosisP26D2 relates to engine coolant pump control module over temperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D3Engine Coolant Pump Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26D3 relates to engine coolant pump supply voltage circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D4Engine Coolant Pump Supply Voltage Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26D4 relates to engine coolant pump supply voltage circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D5Engine Coolant Pump Supply Voltage Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26D5 relates to engine coolant pump supply voltage circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D6Engine Coolant Pump Clutch Control Circuit/OpenCheck soonTransmission Issues30–120 minutes for initial diagnosisP26D6 relates to engine coolant pump clutch control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D7Engine Coolant Pump Clutch Performance/Stuck OffCheck soonTransmission Issues30–120 minutes for initial diagnosisP26D7 relates to engine coolant pump clutch performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D8Engine Coolant Pump Clutch Stuck OnCheck soonTransmission Issues30–120 minutes for initial diagnosisP26D8 relates to engine coolant pump clutch stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P26D9Engine Coolant Pump Clutch Control Circuit LowCheck soonTransmission Issues30–120 minutes for initial diagnosisP26D9 relates to engine coolant pump clutch control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26DAEngine Coolant Pump Clutch Control Circuit HighCheck soonTransmission Issues30–120 minutes for initial diagnosisP26DA relates to engine coolant pump clutch control circuit high. 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.