B011DFluid Reservoir Level Sensor B
- Generic OBD-II code · Body
- How the car detects it
- B011D concerns level sensor B. Not every washer tank relies on a float. Volkswagen's bulletin 2037322 (2015) describes its washer level sensor G33 as a part whose reading depends on the fluid itself: the wrong mix or additives coat the sensor, cut its sensitivity and leave the lamp lit with a full tank; the remedy is draining, cleaning the sensor and refilling with approved fluid. Sensors moulded into the reservoir cannot be replaced on their own. A non-contact alternative is the capacitive single-point detector of patent US5017909A, fixed on the outside wall at the minimum level, where the liquid shifts the measured capacitance. Which principle sits behind letter B is not published, and no maker lists B011D publicly.
- What you may notice
- Warning lamp lit with a full reservoir, often after a change of washer fluid
- Level warning appears late or not at all
- Likely causes
- LikelyDeposits from unsuitable washer fluid or additives on the sensing surface
- PossibleSensor electronics or electrodes defective
- RareOpen or short in the sensor wiring
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.