U0140
Lost Communication with Body Control Module
1994-2003 Aston Martin DB7 3.2L I6 Supercharged
High SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the BCM.
Symptoms
- Multiple electrical features inoperative
- Lighting issues
- Lock/unlock not working
- Warning lights on
Common Causes
- BCM power failure
- CAN bus issue
- BCM failure
- Water damage
Diagnostic Steps
- Check BCM fuses
- Test power and ground
- Check CAN wiring
- Inspect for water damage
Repair Notes
Check for water intrusion (common BCM failure cause). Check fuses.
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
U0140 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 DB9
2004-2016 6.0L V12
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 U0140 mean on a 1994-2003 Aston Martin DB7?
U0140 stands for "Lost Communication with Body Control Module". Cannot communicate with the BCM.
What are the symptoms of U0140 on a Aston Martin DB7?
Common symptoms of U0140 include: Multiple electrical features inoperative, Lighting issues, Lock/unlock not working, Warning lights on.
What causes U0140 on a 1994-2003 Aston Martin DB7?
Common causes of U0140 include: BCM power failure, CAN bus issue, BCM failure, Water damage.