Pinpoint Test I : U0121:00: Notes
WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module: No Sub Type Information | A continuous memory and on-demand DTC that sets in continuous memory if the HCM does not receive data messages from the ABS module through the GWM are missing for 5 seconds or longer. |
Possible Sources
- Communication concern
- Battery voltage concern
- ABS module
- HCM