Lost Communication with Body Control Module B
2004-2016 Aston Martin DB9 6.0L V12
Description
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.
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
U0142 on Other Vehicles
Aston Martin DB11
2016-2024 4.0L V8 Twin Turbo
Aston Martin DB11
2016-2024 5.2L V12 Twin Turbo
Aston Martin DB7
1994-2003 3.2L I6 Supercharged
Aston Martin DBS Superleggera
2019-2024 5.2L V12 Twin Turbo
Aston Martin DBX
2020-2024 4.0L V8 Twin Turbo
Aston Martin Vantage
2005-2024 4.7L V8
Aston Martin Vantage
2018-2024 4.0L V8 Twin Turbo
Common Questions
What does code U0142 mean on a 2004-2016 Aston Martin DB9?
U0142 stands for "Lost Communication with Body Control Module B". Cannot communicate with the secondary body control module.
What are the symptoms of U0142 on a Aston Martin DB9?
Common symptoms of U0142 include: Partial body electronics failure, Some lights not working, Partial lock/unlock failure, Specific body features down.
What causes U0142 on a 2004-2016 Aston Martin DB9?
Common causes of U0142 include: BCM B failure, CAN bus wiring issue, Module power loss, Fuse blown, Water damage.