Body, generic

B0103 Sensor Cleaning Air Blower Actuator B Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

With B0103 the module flags the command line of blower B, not the blower: open wire, short or a driver that cannot switch. In compressed-air layouts the controlled element is often a valve bank. Uber's patent lets the controller fire individual solenoids for set times, for example one valve for three seconds, so a single faulty drive line leaves only part of the lidar or one camera without air. Ford’s test-car tiara blows an air curtain through slots beside each lens to keep insects off, so a dead control line on the B side lets dirt settle where air should flow. Kautex says its software prioritises cleaning points by coordinating actuators. Which outlets belong to B is unpublished, and no carmaker documents B0103; its partner on the A side is B0102.

Likely causes

Damaged harness or connector in the control path of blower B
Solenoid coil of the B air valve open or shorted, where air is valve-switched
Failed driver for blower B in the controlling module

Symptoms

  • Lens streaks or droplets remain after a wash cycle
  • Cleaning warning for sensors on the B circuit only
  • Assistance features temporarily unavailable in rain or dust

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–500
Time0.5–2.5 h

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

Parts involved

sensor cleaning air blower bactuator wiringobject detection maintenance module b

Related codes

B0101B0102B0105

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