Pinpoint Test A : U0121: Notes
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty and 2019 Ford F-450 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
U0121
DTC Fault Trigger Condition-PCM
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module | The PCM sets this DTC if data messages from the ABS module through the GWM are missing. |
Normal Operation and Fault Conditions
REFER to: Communications Network - System Operation and Component Description .
Possible Sources
- Communications network concern
- ABS module
- GWM
- PCM