Body, generic

B0133 A/V Sensor Washer Fluid E Control Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0133 covers the control circuit of A/V sensor washer fluid E, the fifth channel after B012F to B0132. Autonomous vehicles carry many cameras and lidar units, so cleaning is split into several separately switched fluid paths. Uber's patent US10220817B2 shows a sensor platform whose grooves and raised rim carry fluid and air to the sensor heads. Kautex says its Allegro control software assigns priority among the sensors when coordinating the actuators. In a lab study on lidar windows, results depended above all on the kind of deposit, its density and whether it had dried. Which sensor is on channel E is not disclosed, and no carmaker documents B0133. If the channel stays switched off, deposits on that sensor are no longer removed.

Likely causes

Pump or valve of channel E defective, coil open or shorted
Water ingress or corrosion in the connector of channel E
Output for channel E in the cleaning control module damaged

Symptoms

  • The sensor on channel E keeps a film of dirt or dried spray
  • Message that a sensor is blocked or an assistance function is unavailable

Repair estimate

DifficultyMediumDIY possible
Parts and labour€30–400
Time0.3–2 h

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

Parts involved

av washer fluid pump epump wiring

Related codes

B012FB0130B0131B0132B0134

References: patents.google.com, kautex.com, pmc.ncbi.nlm.nih.gov.