Body, generic

B0109 LIDAR Washer Actuator D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Pump or valve D for the fourth lidar nozzle defective
Hose to lidar D kinked or pulled off, so the actuator runs dry or overloaded
Open or shorted wire to actuator D

Symptoms

  • One lidar remains dirty while the other sensors are cleaned
  • Vehicle limits or ends automated driving

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–700
Time0.3–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

lidar washer actuator dactuator wiringobject detection maintenance module a

Related codes

B0106B0107B0108B010AU022E

References: kautex.com, patents.google.com, eenewseurope.com.