OBD2 Error Code P0354: How to Fix It

Q: Can I drive with P0354 error code?

You should avoid driving with P0354 as it indicates cylinder 4 misfiring, which can damage the catalytic converter and reduce engine performance. Get it fixed as soon as possible.

Q: How much does it cost to fix P0354?

Fixing P0354 typically costs $150-$400, depending on whether you need a new ignition coil ($50-$200), spark plug ($10-$30), or professional labor ($100-$150).

Q: What causes ignition coil failure?

Common causes include worn spark plugs creating excessive load, oil leaks contaminating the coil, overheating, normal wear over time, or electrical system problems.

Q: Should I replace all ignition coils at once?

If your vehicle has high mileage (over 100,000 miles) and original coils, consider replacing all coils preventively to avoid future failures and diagnostic costs.

Abstract

OBD2 error code P0354 indicates a malfunction in the ignition coil D primary or secondary circuit. This means the engine control module has detected an electrical problem with cylinder 4's ignition coil, which can cause misfires, rough idling, and reduced engine performance.