U0149
Lost Communication with Seat Control Module C
2019-2024 BMW 3 Series G20 2.0L I4 Turbo B48
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the rear seat control module on vehicles with powered rear seats.
Symptoms
- Rear power seat not adjustable
- Rear seat recline not working
- Rear heated seats from module offline
Common Causes
- Rear seat module failure
- Wiring issue
- Power loss
- Fuse blown
Diagnostic Steps
- Check rear seat module fuse
- Test power and ground
- Inspect wiring to rear seats
- Check module connector
Repair Notes
Check rear seat module fuse and connector access behind rear seat.
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
U0149 on Other Vehicles
Common Questions
What does code U0149 mean on a 2019-2024 BMW 3 Series G20?
U0149 stands for "Lost Communication with Seat Control Module C". Cannot communicate with the rear seat control module on vehicles with powered rear seats.
What are the symptoms of U0149 on a BMW 3 Series G20?
Common symptoms of U0149 include: Rear power seat not adjustable, Rear seat recline not working, Rear heated seats from module offline.
What causes U0149 on a 2019-2024 BMW 3 Series G20?
Common causes of U0149 include: Rear seat module failure, Wiring issue, Power loss, Fuse blown.