U0170
Lost Communication with Blind Spot Detection Module
2014-2021 BMW i3 Range Extender
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the blind spot monitoring system module.
Symptoms
- Blind spot indicators not working
- BSM warning light
- Blind spot system disabled message
- Side mirror indicators off
Common Causes
- BSM module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- BSM sensor blocked or damaged
Diagnostic Steps
- Check BSM module fuse
- Test power and ground
- Check CAN wiring
- Inspect BSM sensors in rear bumper
- Clean sensor area
- Test module with diagnostics
Repair Notes
Check fuses. BSM sensors in rear bumper can be damaged or blocked by dirt/ice.
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
U0170 on Other Vehicles
Common Questions
What does code U0170 mean on a 2014-2021 BMW i3?
U0170 stands for "Lost Communication with Blind Spot Detection Module". Cannot communicate with the blind spot monitoring system module.
What are the symptoms of U0170 on a BMW i3?
Common symptoms of U0170 include: Blind spot indicators not working, BSM warning light, Blind spot system disabled message, Side mirror indicators off.
What causes U0170 on a 2014-2021 BMW i3?
Common causes of U0170 include: BSM module failure, CAN bus wiring, Module power loss, Fuse blown, BSM sensor blocked or damaged.