U0142moderate severityNetwork
Lost Communication with Body Control Module B
on 2020 Subaru Impreza 2.0L H4 · AWD
What this code 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
Repair notes
Check fuses and look for water intrusion. Secondary BCMs are common on larger vehicles.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus