U0134high severityNetwork
Lost Communication with Active Steering Control Module
on 2021 Ford Mustang Mach-E Standard Range Dual Motor AWD · RWD
What this code means
Cannot communicate with the active or four-wheel steering control module.
Symptoms
- Steering warning light
- Active steering disabled
- Rear steering inoperative
- Steering feels different at speed
Common causes
- Active steering module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Steering rack actuator issue
Diagnostic steps
- Check active steering module fuse
- Test power and ground
- Check CAN wiring
- Test steering actuator
- Monitor steering angle data
Repair notes
Active steering failure may affect vehicle handling. Drive cautiously. Check fuses and wiring.
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