B0101Sensor Cleaning Air Blower Actuator B
- Generic OBD-II code · Body
- Can trigger limp mode
- How the car detects it
- B0101 reports a fault of the second cleaning air source, blower B. A second unit makes sense where sensors are spread over the body: a roof pod and a bumper or corner sensor need separate air supplies. Not every design uses a fan; Uber's 2016 patent (now Aurora) feeds lidar and camera air knives from a compressor and accumulator held at about 140–160 psi, with one solenoid valve per outlet and a pressure sensor that raises a warning on a leak. AUMOVIO's lidar nozzles use compressed air to strip water droplets and to clear dust without washer fluid, and Kautex's Allegro systems combine water and air for camera and lidar. The split between A and B is not published by any carmaker, nor is B0101 itself.
- What you may notice
- Cleaning fault shown for the sensor group served by blower B
- Water droplets or dust remain on lidar or camera window
- Assistance functions reduced when the affected sensor goes blind
- Likely causes
- LikelyBlower or compressor B worn out or drawing too much current
- PossibleLeaking or split air hose so blower B cannot build pressure
- RareWater or salt ingress into blower B at an exposed mounting point
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.