U0178
Lost Communication with Rain Sensor Module
2014-2021 BMW i3 Range Extender
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the rain-sensing windshield wiper module.
Symptoms
- Auto wipers not working
- Rain sense feature disabled
- Wipers only work in manual mode
Common Causes
- Rain sensor failure
- Wiring issue
- Sensor not bonded to windshield
- Fuse blown
- Windshield replacement error
Diagnostic Steps
- Check rain sensor power
- Test wiring
- Verify sensor bonded to windshield properly
- Check fuse
- Inspect sensor gel pad
Repair Notes
Check sensor mounting gel pad on windshield. Must be rebonded during windshield replacement.
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
U0178 on Other Vehicles
Common Questions
What does code U0178 mean on a 2014-2021 BMW i3?
U0178 stands for "Lost Communication with Rain Sensor Module". Cannot communicate with the rain-sensing windshield wiper module.
What are the symptoms of U0178 on a BMW i3?
Common symptoms of U0178 include: Auto wipers not working, Rain sense feature disabled, Wipers only work in manual mode.
What causes U0178 on a 2014-2021 BMW i3?
Common causes of U0178 include: Rain sensor failure, Wiring issue, Sensor not bonded to windshield, Fuse blown, Windshield replacement error.