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P0455 P0xxx · パワートレーン (P) 重大度低
Evaporative Emission Control System Leak Detected (Gross Leak)
A large leak — the system cannot hold any pressure at all. Usually an obvious physical fault: missing cap, split hose, or a disconnected line.
重大度の目安： 低 — 通常は走行性への影響なし。次の定期点検時に対処してください
確認できる症状
- Strong fuel smell
- Check-engine light
- Visible fuel vapour in extreme cases
主な原因
可能性の高い順に並んでいます。上から順に確認してください。
- 1 Missing or badly seated fuel cap
- 2 Disconnected vapour hose
- 3 Split filler neck hose
- 4 Damaged canister
点検・修理の手順
費用が安く侵襲の小さい項目から — これらのコードの大半は部品の問題ではありません。
- ✓ Look for the cap first — the majority of gross leaks are nothing more than that.
- ✓ Follow every vapour hose from tank to canister to purge valve.
- ✓ Smoke-test to confirm the repair.
- ✓ Re-run the EVAP monitor with a scan tool before returning the car.
修理の選択肢
- Fit the correct fuel cap
- Reconnect or replace the hose
- Replace the damaged canister
P0455 — よくあるご質問
Is it an emergency? +
No, but a gross leak is a genuine fire risk. Do not park over a heat source and fix it promptly.
Will the light clear on its own? +
Only after the monitor runs and passes, which needs a drive cycle with a partly filled tank.