Body, generic

B0134 A/V Sensor Washer Fluid F Control Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B0134 is the last of the six A/V sensor washer fluid circuits (B012F for A up to B0134 for F) and covers channel F. The module drives a pump or valve on this channel and reports the code when it finds an open or shorted output. Ford's US10569746B2 lets the computer decide from the measured opacity of a sensor window whether spraying is enough or a wiper must follow. Uber's US10173646B1 runs the cleaning units in an order derived from sensor condition. The KTH thesis for Scania found that changing pump output moved the wave front of fluid across a sensor fascia. Which sensor channel F supplies is not published, and no carmaker documents B0134. Until it is repaired, sensor F loses its washer supply.

Likely causes

Winding of the channel F pump or valve open or shorted
Wiring of channel F damaged, for example after bodywork near the sensor mount
Driver stage for channel F in the module failed

Symptoms

  • Sensor F no longer gets washer fluid; only air or a wiper, if present, still works
  • Assistance functions that rely on sensor F report reduced availability

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 fpump wiring

Related codes

B012FB0130B0131B0132B0133

References: patents.google.com, patents.google.com, diva-portal.org.