P0302
P0302 Check Engine Code
Cylinder 2 Misfire Detected
One cylinder is missing — this time cylinder 2 in your engine's firing order. P0302 names that miss so diagnosis can stay on that hole: coil, plug, injector, or compression. You may feel the same shake or stumble as other misfire codes; the difference is the scan tool already pointed at position 2. A flashing light still means unburned fuel can hurt the catalytic converter, so treat active misfire with the same urgency as P0301.
Symptoms
- Check engine light with P0302 stored or pending
- Rough idle or hesitation; may feel like P0300 if counts jump around
- Flashing light under acceleration — active misfire
- After water intrusion or oil in the plug well on bank 1
Can I keep driving with a P0302 code?
Same guidance as P0301 — gentle driving if the light is steady; stop aggressive driving if it is flashing.
Oil in the coil boot — diagnose before repeated starts wash oil into the catalyst.
Common causes
- Ignition coil or spark plug on cylinder 2
- Oil leaking into the plug tube from a valve cover gasket
- Injector fault on cylinder 2
- Compression loss on cylinder 2
Often sounds like
- P0300
- P0301
- P0303
If you wait
- Catalyst damage from unburned fuel
- Oil-fouled coil boot becoming a repeat misfire
How we check it
- 1 Misfire counts on cylinder 2
- 2 Inspect plug well for oil
- 3 Coil and plug test
What happens next when you bring it in?
- 1 Call with when it misfires and any oil smell under the hood.
- 2 We confirm cylinder 2 on live data before quoting parts.
Questions we get a lot
- What does P0302 mean?
- P0302 is Cylinder 2 Misfire Detected. The computer logged repeated misfire events on the cylinder in the number 2 firing position for your engine — not necessarily the second cylinder from the front.
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