OBD
P0302
Cylinder 2 Misfire Detected
What it means
P0302 means Cylinder 2 Misfire Detected.
Check these first
- Faulty spark plug or ignition coil on cylinder 2
- Clogged or leaking injector on cylinder 2
- Vacuum leak at the intake runner for cylinder 2
- Low compression in cylinder 2
- Engine mechanical or valvetrain wear
What to do next
- Verify misfire count with an OBD-II scanner
- Swap coil and plug from cylinder 2 to another cylinder and watch the misfire move
- Inspect the cylinder 2 injector
- Compression test cylinder 2
- Check the intake runner for leaks
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Updated
Generic SAE J2012 definition. Last updated 2026-08-30.