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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 1225–1248 of 6682

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P063EAuto Configuration Throttle Input Not Present Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP063E relates to auto configuration throttle input not present bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P063FAuto Configuration Engine Coolant Temperature Input Not PresentCheck soonEngine Problems30–120 minutes for initial diagnosisP063F relates to auto configuration engine coolant temperature input not present. Check the fault conditions and vehicle-specific procedure before replacing parts.P0640Intake Air Heater Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0640 relates to intake air heater control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0641Sensor Reference Voltage A Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0641 relates to sensor reference voltage a circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0642Sensor Reference Voltage A Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0642 relates to sensor reference voltage a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0643Sensor Reference Voltage A Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0643 relates to sensor reference voltage a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0644Driver Display Serial Communication CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0644 relates to driver display serial communication circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0648Immobilizer Lamp Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0648 relates to immobilizer lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0649Speed Control Lamp Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0649 relates to speed control lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P064AFuel Pump Control Module ACheck soonFuel System30–120 minutes for initial diagnosisP064A relates to fuel pump control module a. Check the fault conditions and vehicle-specific procedure before replacing parts.P064BPTO Control ModuleCheck soonSensors & Electronics30–120 minutes for initial diagnosisP064B relates to pto control module. Check the fault conditions and vehicle-specific procedure before replacing parts.P064CGlow Plug Control Module 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP064C relates to glow plug control module 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P064DInternal Control Module O2 Sensor Processor Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP064D relates to internal control module o2 sensor processor performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P064EInternal Control Module O2 Sensor Processor Performance Bank 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP064E relates to internal control module o2 sensor processor performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P064FUnauthorized Software/Calibration DetectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP064F relates to unauthorized software/calibration detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P0650MIL Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0650 relates to mil control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0651Sensor Reference Voltage B Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0651 relates to sensor reference voltage b circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0652Sensor Reference Voltage B Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0652 relates to sensor reference voltage b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P0653Sensor Reference Voltage B Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0653 relates to sensor reference voltage b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P0654Engine RPM Output Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0654 relates to engine rpm output circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0655Engine Hot Lamp Output Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP0655 relates to engine hot lamp output control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0656Fuel Level Output CircuitCheck soonFuel System30–120 minutes for initial diagnosisP0656 relates to fuel level output circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P0657Actuator Supply Voltage A Circuit/OpenCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0657 relates to actuator supply voltage a circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P0658Actuator Supply Voltage A Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP0658 relates to actuator supply voltage a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.