P0302 Check Engine Code
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.
Often confused with
- P0300
- P0301
- P0303
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
If you ignore it
- Catalyst damage from unburned fuel
- Oil-fouled coil boot becoming a repeat misfire
Repair overview
- Misfire counts on cylinder 2
- Inspect plug well for oil
- Coil and plug test
What happens next
- Call with when it misfires and any oil smell under the hood.
- We confirm cylinder 2 on live data before quoting parts.
Questions
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.