What does it mean?
B1913 is a Body (airbags, seat belts, body electronics) fault code. It indicates: Outside Mirror - Right vertical Motor or Sensor .
Symptoms
- Right mirror does not tilt up or down while horizontal movement is normal
- Buzzing from the mirror with no glass movement
- Memory recall sets the wrong vertical angle or aborts
- Automatic reverse tilt does not function on the passenger side
- Fault comes and goes with door movement, pointing to the jamb harness
Likely causes
- Vertical motor failed or seized inside the right mirror actuator
- Stripped gears or a broken mounting inside the mirror after the glass was forced by hand
- Worn vertical potentiometer on memory mirror systems
- Broken wire in the passenger door jamb boot or in the door loom
- Water and corrosion in the mirror connector or the door module connector
- Glass jammed by ice, a lodged trim clip or a badly fitted aftermarket mirror glass
- Door or memory module driver failure on that output
How to fix it
- Check both axes of both mirrors and document exactly which movement is missing
- Remove ice or obstructions and verify the glass can move freely before removing trim
- Watch the mirror position data on the scan tool while adjusting, to see whether the vertical channel responds
- Measure voltage at the mirror connector during a command in both directions
- Flex the passenger door jamb harness while measuring to reveal an intermittent break
- Repair the wiring, then fit a new mirror actuator or glass carrier if the motor or sensor is proven faulty
- Replace the controlling module only after wiring and actuator have both been verified