OBD-II code B0134 indicates a malfunction in the control circuit for the washer fluid pump or valve that supplies fluid to a specific sensor (often a camera or lidar sensor in advanced driver-assistance systems). This code is set when the body control module (BCM) or sensor control module detects an electrical fault, such as an open, short, or high resistance, in the circuit that activates the washer fluid for that sensor.
The pump or valve that directs fluid to the sensor may be seized, shorted internally, or mechanically failed, preventing proper operation.
Corrosion, broken wires, or loose connections between the control module and the pump/valve can cause high resistance or open circuits.
A blown fuse or defective relay in the washer fluid pump circuit will interrupt power supply, triggering the code.
Blocked fluid lines or a clogged nozzle can cause the pump to work against excessive pressure, leading to an electrical fault detection.
In rare cases, the control module itself may have an internal fault causing incorrect circuit monitoring or failure to activate the pump. This is the least likely cause and should only be considered after all other possibilities are ruled out.
Yes, the vehicle is generally safe to drive, but the affected sensor cleaning system may not work, potentially reducing the effectiveness of driver-assistance features in adverse conditions.
No, this code is almost never caused by a faulty PCM/ECM. The issue is typically in the washer fluid pump, wiring, or body control module. Replacing the PCM without proper diagnosis is a common misstep and will not fix the problem.
Low fluid alone usually does not set this code, but if the pump runs dry and overheats, it may cause an electrical fault. Always check fluid level first.
While the definition 'Av Sensor Washer Fluid F Control Circuit' may appear in some manufacturer-specific documentation, the diagnostic approach is similar across vehicles with sensor cleaning systems.