Driver Power Mirror Circuit Malfunction
What does B1106 mean?
The B1106 code means the vehicle's onboard diagnostic system has detected: Driver Power Mirror Circuit Malfunction. This is a low severity code.
Common Symptoms
- Driver side mirror does not adjust electrically
- Mirror adjustment switch unresponsive for left mirror
- Mirror does not fold with power fold feature
- Mirror vibrates while driving
- Mirror heater not working on driver side
Probable Causes (Ranked by Likelihood)
- Failed driver mirror adjustment motor Very High
- Faulty mirror adjustment switch High
- Damaged wiring in driver door mirror harness Moderate
- Mirror control module failure Low
Step-by-Step Diagnostic Procedure
-
Test mirror switch for all adjustment directions
-
Check voltage at mirror connector during adjustment
-
Inspect wiring at door mirror base for damage
-
Test mirror switch continuity with multimeter
-
Swap mirror selector between left and right to isolate issue
Frequently Asked Questions
Can I manually adjust the mirror if the motor fails?
On most vehicles you can gently push the mirror glass by hand to adjust it, though it will not hold its position as firmly and may drift from vibration while driving.
Are the mirror motors replaceable separately?
On some vehicles, the adjustment motors can be replaced individually. On others, the entire mirror assembly must be replaced as a unit, which is more expensive.
Why does my mirror vibrate at highway speed?
A failed mirror motor can leave the mirror glass loose in its housing. Without the motor holding tension, the glass vibrates from wind pressure at higher speeds.