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P0201 P0xxx · 동력계 (P) 심각도 높음
Injector Circuit Malfunction — Cylinder 1
The ECU detects an electrical problem on the cylinder 1 injector driver circuit: open, short, or a coil that is out of specification.
심각도 안내: 높음 — 즉시 주행을 멈추고 진단하세요. 추가 손상 위험이 있습니다
확인할 수 있는 증상
- Hard misfire on cylinder 1
- Fuel smell from the exhaust
- Rough running
- Possible catalyst damage from raw fuel
주요 원인
가능성이 높은 순서로 정렬되어 있습니다. 위부터 확인하세요.
- 1 Failed injector coil
- 2 Open or shorted injector wiring
- 3 Corroded injector connector
- 4 Failed ECU driver (rare)
점검 방법
비용이 적고 침습적이지 않은 항목부터 — 대부분의 코드는 부품 문제가 아닙니다.
- ✓ Confirm the misfire follows the cylinder with a misfire counter, not just a feel.
- ✓ Measure injector resistance at the connector and compare with specification.
- ✓ Swap the injector with another cylinder; if the fault moves, the injector is bad.
- ✓ Use a noid light or scope the injector pulse to check the ECU is driving it.
수리 방법
- Replace the faulty injector
- Repair the wiring or connector
- ECU repair if the driver stage is dead
P0201 — 자주 묻는 질문
Can I drive with a dead injector? +
No — raw fuel washes the cylinder and destroys the catalytic converter within a short distance.
Should I replace all injectors? +
If mileage is high, replacing the full set avoids doing the labour twice; at minimum have the whole set flow-tested and cleaned.