Body, generic

B0102 Sensor Cleaning Air Blower Actuator A Control

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

B0102 narrows the blower A problem down to its control path: the controlling module sees a wrong voltage or current on the line that commands blower A, typically an open circuit, a short to ground or a short to supply. In Ford's lidar cleaning patent US10569746B2 a computer opens airflow from a blower or compressor by driving an electric solenoid valve and may modulate it; when window opacity exceeds about 30 %, air runs first and autonomous mode may be dropped. Ford's later patent US12115948B2 places the blower beside the sensor on its bracket, so its feed runs into an exposed pod. Valeo notes that an obstructed lens can end automated operation. No carmaker publishes B0102. Unlike B0100, the blower itself may be fine here.

Likely causes

Broken control wire or pin between module and blower A
Control line of blower A shorted to ground or to battery voltage
Output stage in the cleaning or maintenance module defective

Symptoms

  • Blower A never starts although cleaning is requested
  • Blower A runs constantly when the line is shorted to supply
  • Sensor blocked message and limited assistance features

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 aactuator wiringobject detection maintenance module a

Related codes

B0100B0103B0104

References: patents.google.com, patents.google.com, valeo.com.