U0143
NetworkModule Communicationmoderate severityLost Communication with Body Control Module C
What U0143 Means
Cannot communicate with the tertiary body control module found on some full-size vehicles.
Symptoms
- Specific body electronic features inoperative
- Liftgate not working
- Power running boards disabled
- Specific zone lighting off
Common Causes
- BCM C failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic Steps
- Check BCM C fuse
- Test power and ground
- Check CAN wiring
- Test affected features directly
Where to start: Check fuses and wiring. Only found on vehicles with three or more body control modules.
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