Body, generic

B0100 Sensor Cleaning Air Blower Actuator A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

B0100 is the general fault for air blower A in a sensor cleaning system, i.e. the fan or motor unit itself rather than its wiring or relay (those are B0102 and B0104). Such blowers keep camera lenses and lidar windows clear of droplets, dust and insects. Ford's patent US12115948B2 mounts a blower on the sensor bracket; it pulls outside air through an intake duct and pushes it out across a cylindrical lidar window and a camera lens. In Ford's roof-mounted sensor tiara for its self-driving test fleet, slots release an air curtain that deflects most bugs, and air also dries a lens after washing. Which blower is A is up to the maker. No vehicle manufacturer documents B0100 publicly. A dead blower lets dirt build up until the sensor reports itself blocked.

Likely causes

Blower A motor worn, seized or with an open winding
Impeller blocked by ice, leaves or debris in the intake duct
Corroded or loose plug directly at blower A

Symptoms

  • Sensor blocked or cleaning fault message
  • Driver assistance or automated driving functions limited or switched off
  • No airflow audible or felt at the sensor outlets

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–900
Time0.5–3 h

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

Parts involved

sensor cleaning air blower aobject detection maintenance module a

Related codes

B0101B0102B0104U022E

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