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P0302 P0xxx · 동력계 (P) 심각도 높음
Cylinder 2 Misfire Detected
Cylinder 2 is misfiring. The diagnostic logic is identical to P0301 — the cylinder number simply tells you where to start looking.
심각도 안내: 높음 — 즉시 주행을 멈추고 진단하세요. 추가 손상 위험이 있습니다
확인할 수 있는 증상
- Rough idle
- Flashing MIL under load
- Poor acceleration
- Fuel in the oil with prolonged driving
주요 원인
가능성이 높은 순서로 정렬되어 있습니다. 위부터 확인하세요.
- 1 Failed ignition coil or plug on cylinder 2
- 2 Clogged or leaking injector
- 3 Low compression
- 4 Head gasket leaking between cylinders
점검 방법
비용이 적고 침습적이지 않은 항목부터 — 대부분의 코드는 부품 문제가 아닙니다.
- ✓ Confirm with the cylinder-specific misfire counter.
- ✓ Swap coil and plug to another cylinder and re-read the counters.
- ✓ Check compression; if two adjacent cylinders are both low, suspect the head gasket between them.
- ✓ Inspect the injector spray pattern on a flow bench if ignition is ruled out.
수리 방법
- Replace the ignition components
- Service or replace the injector
- Head gasket repair if compression is low on adjacent cylinders
P0302 — 자주 묻는 질문
Two adjacent cylinders low on compression — what does that mean? +
Almost always a head gasket that has failed between the two cylinders, not two independent faults.
Can bad fuel cause a single-cylinder misfire? +
Rarely. Contaminated fuel usually affects all cylinders; a single cylinder points to a hardware fault.