OBD-II code · Network
U0148 Lost Communication with Body Control Module "C"
The Body Control Module "C" has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. A third body controller is unreachable; its assigned body functions are affected. 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.
Is it safe to drive with U0148?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyBCM-C unpowered
- PossibleCAN wiring to BCM-C broken
- Less likelyGateway module routing CAN messages incorrectly
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
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Usually unaffected
- Parts involved
- Body Control Module, Can Bus Wiring
Related codes
- U0145Lost Communication with Restraints Control Module Auxiliary
- U0146Lost Communication with Gateway "A"
- U0147Lost Communication with Gateway "B"
- U0149Lost Communication with Door Driver Module
- U014ALost Communication With Battery Energy Control Module C
- U014BLost Communication With Hybrid/EV Battery Inductive Charging Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.