B1779
Mirror Driver Down Circuit Open
B1779 is an OBD-II diagnostic trouble code meaning: Mirror Driver Down Circuit Open. Common causes: broken wires in the harness, mirror motor malfunction. Estimated repair cost: $22–111.
Symptoms
- The mirror is not adjustable downwards
- The mirror does not respond to commands from the switch
- Random mirror movement
Causes
- Broken wires in the harness
- Mirror motor malfunction
- Problems with the adjustment switch
- Short circuit in the circuit
- Malfunction of the mirror control unit
How to Fix
- Check the integrity of the mirror wiring harness
- Check the operation of the adjustment switch
- Check the mirror motor
- Check fuses and relays
- Diagnose the mirror control unit
Related codes
FAQ
What does the B1779 code mean?
B1779 is an OBD-II diagnostic trouble code that indicates: Mirror Driver Down Circuit Open
What causes a B1779 error code?
The most common causes of B1779 include: Broken wires in the harness; Mirror motor malfunction; Problems with the adjustment switch; Short circuit in the circuit.
How do I fix a B1779 diagnostic trouble code?
To fix B1779: Check the integrity of the mirror wiring harness. Check the operation of the adjustment switch. Check the mirror motor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1779?
Yes, but get it checked soon
How much does it cost to fix B1779?
The estimated repair cost for B1779 is $22–111. Actual cost depends on your vehicle, location, and labor rates.
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