U0142
NetworkModule Communicationmoderate severityLost Communication with Body Control Module B
What U0142 Means
Cannot communicate with the secondary body control module.
Symptoms
- Partial body electronics failure
- Some lights not working
- Partial lock/unlock failure
- Specific body features down
Common Causes
- BCM B failure
- CAN bus wiring issue
- Module power loss
- Fuse blown
- Water damage
Diagnostic Steps
- Check BCM B fuse
- Test power and ground
- Check CAN wiring
- Inspect for water damage
- Check BCM B connector
Where to start: Check fuses and look for water intrusion. Secondary BCMs are common on larger vehicles.
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