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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 913–936 of 987

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P3499Cylinder 2 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3499 relates to cylinder 2 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349ACylinder 3 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349A relates to cylinder 3 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349BCylinder 4 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349B relates to cylinder 4 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349CCylinder 5 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349C relates to cylinder 5 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349DCylinder 6 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349D relates to cylinder 6 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349ECylinder 7 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349E relates to cylinder 7 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P349FCylinder 8 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP349F relates to cylinder 8 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A0Cylinder 9 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP34A0 relates to cylinder 9 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A1Cylinder 10 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP34A1 relates to cylinder 10 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A2Cylinder 11 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP34A2 relates to cylinder 11 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A3Cylinder 12 Deactivation/Intake Valve PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP34A3 relates to cylinder 12 deactivation/intake valve performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A4A Camshaft Position Actuator Temperature Sensor Circuit Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34A4 relates to a camshaft position actuator temperature sensor circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A5A Camshaft Position Actuator Temperature Sensor Range/Performance Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34A5 relates to a camshaft position actuator temperature sensor range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A6A Camshaft Position Actuator Temperature Sensor Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34A6 relates to a camshaft position actuator temperature sensor circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A7A Camshaft Position Actuator Temperature Sensor Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34A7 relates to a camshaft position actuator temperature sensor circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A8A Camshaft Position Actuator Temperature Sensor Circuit Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP34A8 relates to a camshaft position actuator temperature sensor circuit bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P34A9A Camshaft Position Actuator Temperature Sensor Range/Performance Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP34A9 relates to a camshaft position actuator temperature sensor range/performance bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P34AAA Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP34AA relates to a camshaft position actuator temperature sensor circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P34ABA Camshaft Position Actuator Temperature Sensor Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP34AB relates to a camshaft position actuator temperature sensor circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P34ACA Camshaft Position Actuator Position Sensor A Circuit Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34AC relates to a camshaft position actuator position sensor a circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34ADA Camshaft Position Actuator Position Sensor A Range/Performance Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34AD relates to a camshaft position actuator position sensor a range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34AEA Camshaft Position Actuator Position Sensor A Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34AE relates to a camshaft position actuator position sensor a circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34AFA Camshaft Position Actuator Position Sensor A Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP34AF relates to a camshaft position actuator position sensor a circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P34B0A Camshaft Position Actuator Position Sensor A Circuit Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP34B0 relates to a camshaft position actuator position sensor a circuit bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.