What it means
This code identifies a fault associated with Sensor Cleaning Air Blower Actuator B. The code alone does not specify the failure mode.
How it works
Sensor Cleaning Air Blower Actuator B operates the air-cleaning blower assigned to sensor channel B, helping clear contamination from its associated sensor or camera. B0101 points to a fault associated with actuator B; it does not by itself say whether the blower, wiring, connector, or fuse is at fault.
Common causes
Most likely first.
- Faulty blower actuator
- Open or shorted wiring
- Loose or corroded connector
- Blown fuse
Symptoms
- Sensor or camera visibility warning
- Reduced sensor function
- Warning light or message
How to diagnose it
- Scan the relevant body or driver-assistance module for B0101 and related codes, and review freeze-frame or status data to establish when blower actuator B was flagged.
- Use vehicle service information to locate sensor-cleaning actuator B, then check its housing and air path for blockage, dirt, damage, or water entry.
- Inspect actuator B's connector and harness for corrosion, looseness, chafing, or broken wires.
- Check the circuit fuse and measure actuator B's power and ground against the wiring diagram and manufacturer's specification.
- If supported, command blower actuator B with a scan tool and check for operation and a corresponding module response.
Common fixes
- Remove debris blocking actuator B's air inlet or outlet.
- Reconnect or clean actuator B's connector and repair damaged wiring.
- Replace the fuse if it is open, after checking the circuit for a short or overload.
- Replace sensor-cleaning blower actuator B if it fails a commanded test despite sound power, ground, and wiring.
Can I keep driving?
Driving is generally possible if no other fault affects vehicle control, but the sensor or camera served by blower B may become obscured. Clean that sensor area and avoid relying on its driver-assistance functions when visibility is poor.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.