Network
generic / SAE
U0128
Lost Communication with Park Brake Control Module
The Park Brake Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The electronic parking brake may not release or apply correctly. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 28
Possible causes
- EPB module unpowered high
- CAN wiring to EPB broken medium
- Gateway module routing CAN messages incorrectly low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 100–1500 €
- Estimated time: 1–5 h
- Component: parking brake module
- Component: can bus wiring
- MIL / check engine light
Sources
References
sae:J2012