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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 649–672 of 987

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P2B64Coolant Pump B Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP2B64 relates to coolant pump b control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B66Coolant Pump D Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP2B66 relates to coolant pump d control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B67Coolant Pump D Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2B67 relates to coolant pump d control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B68Coolant Pump D Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2B68 relates to coolant pump d control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B6ACoolant Pump D Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2B6A relates to coolant pump d stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B6BCoolant Pump D Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP2B6B relates to coolant pump d control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B6DEngine Coolant Flow Control Valve Position Sensor Circuit Intermittent/ErraticCheck soonEngine Problems30–120 minutes for initial diagnosisP2B6D relates to engine coolant flow control valve position sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B72Coolant Heater A Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP2B72 relates to coolant heater a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B73Coolant Heater A Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2B73 relates to coolant heater a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B74Coolant Heater A Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2B74 relates to coolant heater a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B75Coolant Heater A Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2B75 relates to coolant heater a control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B76Coolant Heater B Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP2B76 relates to coolant heater b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B77Coolant Heater B Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2B77 relates to coolant heater b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B78Coolant Heater B Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2B78 relates to coolant heater b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B79Coolant Heater B Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2B79 relates to coolant heater b control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B84Charge Air Cooler Coolant Pump A UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B84 relates to charge air cooler coolant pump a underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B85Engine Coolant Pump UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B85 relates to engine coolant pump underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B87Coolant Pump A UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B87 relates to coolant pump a underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B9CCoolant Pump A Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2B9C relates to coolant pump a stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B9ECoolant Pump A Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP2B9E relates to coolant pump a control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B9FCoolant Pump B UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B9F relates to coolant pump b underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2BA0Coolant Pump C UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2BA0 relates to coolant pump c underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2BA1Coolant Pump D UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2BA1 relates to coolant pump d underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2BA2Engine Coolant Pump Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2BA2 relates to engine coolant pump stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.