U0119
Lost Communication with Battery Energy Control Module B
2012-2017 Buick Regal 2.4L I4 Hybrid
Critical SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the secondary battery energy module in multi-battery hybrid systems.
Symptoms
- Hybrid system warning
- Reduced battery capacity
- Limited EV operation
- Battery imbalance warnings
Common Causes
- Battery module B failure
- CAN bus wiring
- 12V supply issue
- Module connector fault
Diagnostic Steps
- Check module B fuse
- Test 12V power and ground
- Check CAN wiring
- Scan battery management system
- Check module B connector
Repair Notes
High-voltage system. Professional service required.
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
U0119 on Other Vehicles
Common Questions
What does code U0119 mean on a 2012-2017 Buick Regal?
U0119 stands for "Lost Communication with Battery Energy Control Module B". Cannot communicate with the secondary battery energy module in multi-battery hybrid systems.
What are the symptoms of U0119 on a Buick Regal?
Common symptoms of U0119 include: Hybrid system warning, Reduced battery capacity, Limited EV operation, Battery imbalance warnings.
What causes U0119 on a 2012-2017 Buick Regal?
Common causes of U0119 include: Battery module B failure, CAN bus wiring, 12V supply issue, Module connector fault.