Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

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.

P · Powertrain Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 7081–7104 of 7353

Most searched first

P3454Cylinder 7 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3454 relates to cylinder 7 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3455Cylinder 7 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3455 relates to cylinder 7 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3456Cylinder 7 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3456 relates to cylinder 7 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3457Cylinder 8 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3457 relates to cylinder 8 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3458Cylinder 8 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3458 relates to cylinder 8 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3459Cylinder 8 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3459 relates to cylinder 8 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3460Cylinder 8 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3460 relates to cylinder 8 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3461Cylinder 8 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3461 relates to cylinder 8 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3462Cylinder 8 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3462 relates to cylinder 8 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3463Cylinder 8 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3463 relates to cylinder 8 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3464Cylinder 8 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3464 relates to cylinder 8 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3465Cylinder 9 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3465 relates to cylinder 9 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3466Cylinder 9 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3466 relates to cylinder 9 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3467Cylinder 9 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3467 relates to cylinder 9 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3468Cylinder 9 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3468 relates to cylinder 9 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3469Cylinder 9 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3469 relates to cylinder 9 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3470Cylinder 9 Exhaust Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3470 relates to cylinder 9 exhaust valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3471Cylinder 9 Exhaust Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3471 relates to cylinder 9 exhaust valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3472Cylinder 9 Exhaust Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3472 relates to cylinder 9 exhaust valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3473Cylinder 10 Deactivation/Intake Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3473 relates to cylinder 10 deactivation/intake valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P3474Cylinder 10 Deactivation/Intake Valve Control Circuit PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP3474 relates to cylinder 10 deactivation/intake valve control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P3475Cylinder 10 Deactivation/Intake Valve Control Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP3475 relates to cylinder 10 deactivation/intake valve control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P3476Cylinder 10 Deactivation/Intake Valve Control Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP3476 relates to cylinder 10 deactivation/intake valve control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P3477Cylinder 10 Exhaust Valve Control Circuit/OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP3477 relates to cylinder 10 exhaust valve control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.