U0143moderate severityNetwork
Lost Communication with Body Control Module C
on 2003 Mazda B2300 2.3L I4 · FWD
What this code 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
Repair notes
Check fuses and wiring. Only found on vehicles with three or more body control modules.
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