B0109LIDAR Washer Actuator D
- Generic OBD-II code · Body
- Can trigger limp mode
- How the car detects it
- B0109 ends the lidar washer group with actuator D; the next codes, B010A onward, move on to camera washers. Four lidar circuits match fleets built for driverless service: Kautex fits two complete Allegro cleaning and clearing systems to every Zoox robotaxi, combining water and air for cameras and lidars. On Ford’s self-driving test cars, nozzles next to each lens spray washer fluid on demand, and the roof tiara that carries cameras and lidar adds an air curtain. In Ford's US10569746B2 the computer can even leave autonomous mode while a lidar window is too opaque. Nothing public tells which unit is D, and no carmaker documents B0109. A failed actuator D usually shows as one lidar staying dirty while the others clean normally.
- What you may notice
- One lidar remains dirty while the other sensors are cleaned
- Vehicle limits or ends automated driving
- Likely causes
- LikelyPump or valve D for the fourth lidar nozzle defective
- PossibleHose to lidar D kinked or pulled off, so the actuator runs dry or overloaded
- RareOpen or shorted wire to actuator D
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.