OBD-II · Network and communication (U)
U0128
Lost communication with electric parking brake module
What it means
Another module has stopped receiving messages from the electric parking brake control unit.
Symptoms
- Parking brake warning light or message
- Electric parking brake will not apply or release
- Auto-hold not available
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | weak 12V battery |
| 02 | blown parking brake fuse |
| 03 | corroded connector at the parking brake module or rear caliper motors |
| 04 | failed parking brake module (on some cars it is built into the ABS unit) |
| 05 | CAN wiring fault |
What to check, step by step
- 01Check 12V battery and parking brake fuses
- 02Check whether the parking brake module answers a scan tool
- 03Inspect connectors for water and corrosion
- 04Test power, ground and CAN at the module
- 05Use wheel chocks or park in gear until the parking brake is confirmed working