Common Checks
- Inspect the cylinder 6 spark plug, coil, boot, and injector connector.
- Move suspect ignition parts to another cylinder for confirmation.
- Check compression and injector operation if the fault remains.
Diagnostic trouble code
P0306 Cylinder 6 Misfire Detected
The PCM detects a misfire on cylinder 6.
Misfire CodesCommon Repairs
- Replace the failed ignition or injector part proven by testing.
- Repair wiring, intake leak, or mechanical issues found by follow-up checks.
Mustang Notes
- Cylinder-specific diagnosis prevents replacing all coils when one coil or boot is the actual fault.
Model-Year Applicability
Listed for 1996 and newer traditional gasoline Mustang pages in this first-pass catalog. Engine, calibration, and Ford-specific codes may narrow that range as more service data is added.