Code B0102 indicates a fault in the control circuit for the sensor cleaning air blower actuator. This blower is designed to direct air across sensor surfaces (such as camera or radar lenses) to keep them clear of debris, dust, or moisture. The code sets when the control module detects an electrical or functional problem in that actuator's circuit.
The blower motor itself is the most common failure point, typically due to internal wear, bearing seizure, or winding failure.
Chafed, corroded, or disconnected wiring between the control module and the blower actuator can cause an open or short circuit.
A blown fuse or failed relay in the power feed to the blower actuator will prevent it from operating and trigger the code.
Debris or physical blockage in the air path can cause the motor to stall or draw excessive current, leading to a circuit fault.
Rarely, the module that commands the blower may have an internal driver failure. This should only be considered after all wiring and the actuator are confirmed good.
The definition is universal; the diagnostics are engine-specific. Open your vehicle for the codes documented for it:
Yes, the vehicle remains drivable. However, ADAS features that rely on a clean sensor may be disabled or may function unreliably until the fault is repaired.
Some control modules will clear the code automatically after a successful self-test, but many require a manual code clear with a scan tool after the repair is completed.
No. Replacing the powertrain or body control module is almost never the fix for this code. The blower actuator, wiring, fuse, or relay are the likely culprits and should all be verified before any module replacement is considered.
No. This code refers specifically to the small air blower used to clean ADAS sensor surfaces, not the HVAC blower motor or engine intake components.