B1646
Mirror Passenger Right Circuit Short To Ground
B1646 is an OBD-II diagnostic trouble code meaning: Mirror Passenger Right Circuit Short To Ground. Common causes: frayed wiring harness in door, short circuit in the mirror motor. Estimated repair cost: $22–78.
Symptoms
- Right side mirror adjustment does not work
- The mirror does not heat up (if there is a heating function)
- Mirror circuit fuse tripping
Causes
- Frayed wiring harness in door
- Short circuit in the mirror motor
- Corrosion of mirror connector contacts
- Mechanical damage to wires
- Body Control Module (BCM) Malfunction
How to Fix
- Visual inspection of mirror wires and connectors
- Checking the mirror circuit resistance with a multimeter
- Replacing damaged wires or connectors
- Checking the operation of the mirror motor
- Diagnostics of the body control unit if necessary
Related codes
FAQ
What does the B1646 code mean?
B1646 is an OBD-II diagnostic trouble code that indicates: Mirror Passenger Right Circuit Short To Ground
What causes a B1646 error code?
The most common causes of B1646 include: Frayed wiring harness in door; Short circuit in the mirror motor; Corrosion of mirror connector contacts; Mechanical damage to wires.
How do I fix a B1646 diagnostic trouble code?
To fix B1646: Visual inspection of mirror wires and connectors. Checking the mirror circuit resistance with a multimeter. Replacing damaged wires or connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1646?
Yes, but get it checked soon
How much does it cost to fix B1646?
The estimated repair cost for B1646 is $22–78. Actual cost depends on your vehicle, location, and labor rates.
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