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C0200 C0xxx · 底盘（C） 高严重度
Steering Angle Sensor / Transfer Case Range Fault
The steering angle signal is missing, out of range or not learned. Stability control and electric power steering assistance depend on it.
严重程度说明： 高——立即停车诊断，继续行驶有扩大损坏的风险
你会注意到的故障现象
- ESP lamp on
- Steering assist inconsistent
- Lane-keeping and ADAS functions disabled
- Vehicle pulls assistance strategy into default
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Steering angle sensor not calibrated
- 2 Clock spring failure
- 3 CAN data fault from the sensor
- 4 Steering work without recalibration
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。
- ✓ Check whether the steering or suspension was recently worked on — recalibration is then the likely fix.
- ✓ Read live steering angle and turn lock-to-lock to check the sweep.
- ✓ Perform the manufacturer's zero-point calibration.
- ✓ Inspect the clock spring if the signal drops intermittently.
维修方案
- Perform steering angle sensor calibration
- Replace the clock spring
- Repair the CAN wiring
C0200 —— 常见问题
Why does it appear after a wheel alignment? +
The sensor's zero point no longer matches straight-ahead. Recalibrate after any steering or alignment work.
Does ADAS stop working too? +
Yes — lane-keeping and camera-based functions rely on a valid steering angle signal.