P0302 — Cylinder 2 Misfire Detected
High severityWhat it means
The engine control unit has counted repeated misfires in cylinder 2. As with any single-cylinder misfire, the cause is usually a component dedicated to that cylinder — its spark plug, ignition coil or fuel injector.
Common symptoms
- Rough idle and engine shaking
- Hesitation or stumble under load
- Flashing or steady check engine light
- Reduced fuel economy
Likely causes
- Worn or fouled spark plug in cylinder 2
- Failing ignition coil on cylinder 2
- Clogged or leaking fuel injector
- Low compression in cylinder 2
- Damaged wiring or connector at the coil
What to check first
- Swap the cylinder 2 coil with a neighbouring cylinder and see if the code moves
- Inspect and replace the spark plug if needed
- Check the injector connector and operation
- Run a compression test if the misfire persists
Can you keep driving?
Misfires can overheat the catalytic converter. Limit driving until repaired, and stop if the check engine light starts flashing.
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All information, explanations and guidance on this page are general preliminary information only. They are estimates and may be entirely wrong, incomplete or inaccurate, or may not apply to your vehicle at all. Never take any action based on this content alone — do not decide to keep driving, clear codes, replace parts, repair or otherwise work on your vehicle based only on what you read here. In every case, and for any final decision, you must consult qualified technical personnel (a professional mechanic, an authorized service centre or an engineer) and obtain their approval before acting. MechanicAI accepts no liability or responsibility whatsoever for any damage, fault, injury, loss or outcome that may arise — directly or indirectly — from using or relying on this information, for any reason and under any circumstances. By using this page you acknowledge and accept these terms.