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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 7057–7080 of 7353

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P3430Cylinder 4 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3430 relates to cylinder 4 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3431Cylinder 4 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3431 relates to cylinder 4 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3432Cylinder 4 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3432 relates to cylinder 4 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3433Cylinder 5 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3433 relates to cylinder 5 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3434Cylinder 5 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3434 relates to cylinder 5 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3435Cylinder 5 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3435 relates to cylinder 5 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3436Cylinder 5 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3436 relates to cylinder 5 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3437Cylinder 5 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3437 relates to cylinder 5 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3438Cylinder 5 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3438 relates to cylinder 5 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3439Cylinder 5 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3439 relates to cylinder 5 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3440Cylinder 5 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3440 relates to cylinder 5 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3441Cylinder 6 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3441 relates to cylinder 6 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3442Cylinder 6 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3442 relates to cylinder 6 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3443Cylinder 6 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3443 relates to cylinder 6 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3444Cylinder 6 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3444 relates to cylinder 6 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3445Cylinder 6 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3445 relates to cylinder 6 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3446Cylinder 6 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3446 relates to cylinder 6 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3447Cylinder 6 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3447 relates to cylinder 6 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3448Cylinder 6 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3448 relates to cylinder 6 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3449Cylinder 7 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3449 relates to cylinder 7 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3450Cylinder 7 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3450 relates to cylinder 7 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3451Cylinder 7 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3451 relates to cylinder 7 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3452Cylinder 7 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3452 relates to cylinder 7 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3453Cylinder 7 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3453 relates to cylinder 7 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.