このページはまだJapanese未対応です。英語原文を表示しています。 英語版で読む →
P0101 P0xxx · パワートレーン (P) 重大度中
Mass Air Flow Circuit Range / Performance
The MAF reading does not match what the ECU expects for the given RPM, throttle and load. Either the sensor is dirty/out of range, or air is entering the engine without being measured.
重大度の目安： 中 — 走行性または排出ガスに影響。今週中に点検を予約してください
確認できる症状
- Hesitation on acceleration
- Lean or rich fuel trims
- Poor idle
- Black smoke on some diesels
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 Contaminated MAF hot-wire or hot-film element
- 2 Air leak after the MAF (split intake boot, loose clamp, cracked PCV hose)
- 3 Clogged air filter
- 4 Wrong or non-original sensor
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。
- ✓ Read MAF grams/second at warm idle and compare with the specification (roughly 1 g/s per litre of displacement).
- ✓ Inspect the whole intake tract from the airbox to the throttle body for loose clamps and cracks.
- ✓ Clean the element with dedicated MAF cleaner only — nothing else.
- ✓ Smoke-test the intake if the leak is not visible; a smoke machine finds it in minutes.
修理の選択肢
- Clean or replace the MAF sensor
- Repair the intake leak
- Replace the air filter
P0101 — よくあるご質問
Can I clean the MAF with brake cleaner? +
No. Use only MAF-specific cleaner; other solvents damage the sensing element.
Why is the fuel trim positive at idle but normal at speed? +
Classic vacuum leak signature — unmetered air matters most when airflow is small.