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C0240 C0xxx · 底盘（C） 中严重度
Traction Control Engine Torque Request Circuit
The traction control module cannot request torque reduction from the engine — a coordination fault rather than a mechanical one.
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
- Wheelspin uncontrolled
- Traction lamp on
- No fault in the engine ECU
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 CAN communication fault
- 2 Engine ECU not accepting torque intervention
- 3 Coding mismatch
- 4 Software issue
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。
- ✓ Scan all modules and look for U-codes alongside.
- ✓ Check coding and variant coding on both sides.
- ✓ Verify the engine ECU can accept a torque request (bidirectional test where supported).
- ✓ Apply outstanding software updates.
维修方案
- Repair the CAN wiring
- Correct the coding
- Update software
C0240 —— 常见问题
Is the gearbox or engine damaged? +
No. This is purely about two modules agreeing on how to manage torque.
Will it fix itself? +
No. It needs coding or network repair.