Lost Communication with Body Control Module C
2018-2025 Fiat Cronos 1.0L I4 Flex Firefly
Description
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.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0143 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code U0143 mean on a 2018-2025 Fiat Cronos?
U0143 stands for "Lost Communication with Body Control Module C". Cannot communicate with the tertiary body control module found on some full-size vehicles.
What are the symptoms of U0143 on a Fiat Cronos?
Common symptoms of U0143 include: Specific body electronic features inoperative, Liftgate not working, Power running boards disabled, Specific zone lighting off.
What causes U0143 on a 2018-2025 Fiat Cronos?
Common causes of U0143 include: BCM C failure, CAN bus wiring, Module power loss, Fuse blown.