U0126moderate severityNetwork
Lost Communication with Steering Angle Sensor Module
on 2002 BMW 540iT E39 4.4L V8 M62 Touring · RWD
What this code means
Cannot communicate with the steering angle sensor.
Symptoms
- Stability control light
- ESC disabled
- Power steering warning (EPS vehicles)
Common causes
- Sensor module failure
- Clock spring issue
- Wiring damage
- CAN bus issue
Diagnostic steps
- Check module power
- Test clock spring
- Inspect wiring
- Check CAN bus
Repair notes
Check clock spring and wiring. Replace sensor module if needed.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus