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P0741 P0xxx · パワートレーン (P) 重大度中
Torque Converter Clutch Circuit Performance / Stuck Off
The torque converter lock-up clutch is not applying when commanded. The engine revs higher than it should at steady cruise and fuel economy suffers.
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
- Higher RPM at motorway speed
- Worse fuel economy
- Transmission fluid running hot
- Possible shudder on light throttle
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 Failed TCC solenoid
- 2 Worn converter clutch
- 3 Low or degraded fluid
- 4 Valve body leakage
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。
- ✓ Watch TCC slip speed in live data during steady cruise — it should fall to near zero when locked.
- ✓ Command the TCC solenoid and watch the response.
- ✓ Check fluid level and condition.
- ✓ Inspect for a shudder at 40–70 km/h, which indicates clutch wear.
修理の選択肢
- Replace the TCC solenoid
- Fluid and filter service
- Converter or transmission rebuild if the clutch is worn
P0741 — よくあるご質問
Why does my economy drop but nothing feels wrong? +
Unlocked converter means constant slip — roughly 200–400 rpm extra at cruise, which you pay for in fuel.
Will additive fix the shudder? +
Sometimes it masks it briefly. The underlying clutch wear remains.