P0302 Check Engine Code
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The problem
P0302 is a cylinder-specific misfire on cylinder 2. The diagnosis path matches P0301 but targets the number 2 firing order position — coil, plug, injector, or compression on that cylinder.
Symptoms
- Check engine light with P0302 stored or pending
- Rough idle or hesitation; may feel like P0300 if counts jump
- 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 steady light; stop aggressive driving if 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 plug tube from valve cover gasket
- Injector fault on cylinder 2
- Compression loss on cylinder 2
What it is often confused with
- P0300
- P0301
- P0303
What happens if you ignore it
- Catalyst damage
- Oil-fouled coil boot becoming a repeat misfire
Diagnostic process
- 1 Misfire counts on cylinder 2
- 2 Inspect plug well for oil
- 3 Coil and plug test
What happens next at LugsNPlugs Automotive?
- 1 Describe when it misfires and any oil smell under the hood.
- 2 We confirm cylinder 2 on live data before parts.
Common questions
- What does P0302 mean?
- P0302 is “Cylinder 2 Misfire Detected” — repeated misfire events on the cylinder in the number 2 firing position for your engine.
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