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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 1465–1488 of 1797

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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.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.P26DFSensor Power Supply D Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26DF relates to sensor power supply d circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E0Sensor Power Supply D Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E0 relates to sensor power supply d circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E1Sensor Power Supply D Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E1 relates to sensor power supply d circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E4Starter Relay B CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E4 relates to starter relay b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E5Starter Relay B Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E5 relates to starter relay b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E6Starter Relay B Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E6 relates to starter relay b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P26E7Actuator Supply Voltage D Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP26E7 relates to actuator supply voltage d circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.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.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.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.P28C0Ion Sense Module Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP28C0 relates to ion sense module supply voltage circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P28C1Ion Sense Module Supply Voltage LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP28C1 relates to ion sense module supply voltage low. Check the fault conditions and vehicle-specific procedure before replacing parts.P28C2Ion Sense Module Supply Voltage HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP28C2 relates to ion sense module supply voltage high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2A06O2 Sensor Negative Voltage Bank 1 Sensor 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2A06 relates to o2 sensor negative voltage bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.