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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.

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 1249–1272 of 6682

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P0659Actuator Supply Voltage A Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0659 relates to actuator supply voltage a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P065AGenerator System PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP065A relates to generator system performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P065BGenerator A Control Circuit Range/PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP065B relates to generator a control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P065CGenerator A Mechanical PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP065C relates to generator a mechanical performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P065DReductant System Malfunction Lamp Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP065D relates to reductant system malfunction lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P065EIntake Manifold Tuning Valve Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP065E relates to intake manifold tuning valve performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P065FIntake Manifold Tuning Valve Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP065F relates to intake manifold tuning valve performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0660Intake Manifold Tuning Valve Control Circuit/Open Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP0660 relates to intake manifold tuning valve control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0661Intake Manifold Tuning Valve Control Circuit Low Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP0661 relates to intake manifold tuning valve control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0662Intake Manifold Tuning Valve Control Circuit High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP0662 relates to intake manifold tuning valve control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P0663Intake Manifold Tuning Valve Control Circuit/Open Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP0663 relates to intake manifold tuning valve control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0664Intake Manifold Tuning Valve Control Circuit Low Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP0664 relates to intake manifold tuning valve control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0665Intake Manifold Tuning Valve Control Circuit High Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP0665 relates to intake manifold tuning valve control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0666Control Module Internal Temperature Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0666 relates to control module internal temperature sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0667Control Module Internal Temperature Sensor A Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0667 relates to control module internal temperature sensor a range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0668Control Module Internal Temperature Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0668 relates to control module internal temperature sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0669Control Module Internal Temperature Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0669 relates to control module internal temperature sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P066ACylinder 1 Glow Plug Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP066A relates to cylinder 1 glow plug control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P066BCylinder 1 Glow Plug Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP066B relates to cylinder 1 glow plug control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P066CCylinder 2 Glow Plug Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP066C relates to cylinder 2 glow plug control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P066DCylinder 2 Glow Plug Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP066D relates to cylinder 2 glow plug control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P066ECylinder 3 Glow Plug Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP066E relates to cylinder 3 glow plug control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P066FCylinder 3 Glow Plug Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP066F relates to cylinder 3 glow plug control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0670Glow Plug Control Module 1 Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0670 relates to glow plug control module 1 control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.