U0204
Lost Communication with Mirror Control Module
1999-2000 BMW 323i E46 2.5L I6
Low SeverityNetworkGeneric (SAE)
Description
Cannot communicate with the power mirror or auto-dimming mirror control module.
Symptoms
- Mirror adjustment not working
- Auto-dimming not functioning
- Mirror memory not working
- Auto-fold mirrors disabled
Common Causes
- Mirror module failure
- Wiring issue
- Module power loss
- Fuse blown
- Mirror motor failure
Diagnostic Steps
- Check mirror module fuse
- Test power and ground
- Inspect door jamb wiring
- Test mirror motors
- Check mirror switch
Repair Notes
Check door jamb wiring. Mirror wiring passes through flex point and commonly breaks.
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
U0204 on Other Vehicles
Common Questions
What does code U0204 mean on a 1999-2000 BMW 323i E46?
U0204 stands for "Lost Communication with Mirror Control Module". Cannot communicate with the power mirror or auto-dimming mirror control module.
What are the symptoms of U0204 on a BMW 323i E46?
Common symptoms of U0204 include: Mirror adjustment not working, Auto-dimming not functioning, Mirror memory not working, Auto-fold mirrors disabled.
What causes U0204 on a 1999-2000 BMW 323i E46?
Common causes of U0204 include: Mirror module failure, Wiring issue, Module power loss, Fuse blown, Mirror motor failure.