U0204low severityNetwork
Lost Communication with Mirror Control Module
on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
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.
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Serious DIY~$100
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Full-system pro platform — topology mapping, ECU coding, the works.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus