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P0741 P0xxx · 动力总成（P） 中严重度
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.
严重程度说明： 中——已影响行驶或排放，请本周内安排检修
你会注意到的故障现象
- Higher RPM at motorway speed
- Worse fuel economy
- Transmission fluid running hot
- Possible shudder on light throttle
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Failed TCC solenoid
- 2 Worn converter clutch
- 3 Low or degraded fluid
- 4 Valve body leakage
如何排查
先做花钱最少、侵入最小的检查——大多数这类码不是零件问题。
- ✓ 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.
维修方案
- Replace the TCC solenoid
- Fluid and filter service
- Converter or transmission rebuild if the clutch is worn
P0741 —— 常见问题
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.