OBD codes / P0354
P0354
SeriousIgnition Coil D Primary/Secondary Circuit
Address promptly — can worsen or affect drivability.
Likely causes
- faulty ignition coil 4
- wiring or connector fault
Common fixes
- replace ignition coil 4
- inspect wiring
Seeing P0354 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0354 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.