OBD codes / P0307
P0307
SeriousCylinder 7 Misfire Detected
Address promptly — can worsen or affect drivability.
Likely causes
- worn spark plug or coil on cylinder 7
- clogged or leaking fuel injector
Common fixes
- replace the cylinder 7 spark plug and coil
- test the injector
Seeing P0307 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0307 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.