B011CFluid Reservoir Level Sensor A
- Generic OBD-II code · Body
- How the car detects it
- B011C is the first of six fluid reservoir level sensors, A to F. J2012 does not say which reservoir each letter belongs to; the neighbouring codes deal with washing windows, cameras and other sensors, so washer tanks are the obvious candidates. The classic design pairs a magnet-bearing float with a reed switch: falling fluid lowers the float, and the contact flips. The application US20040200278A1 shows such a unit pushed through a rubber grommet in the tank side wall. FCA parts tip 9003109 adds a practical failure: a float that has turned out of its anti-rotation guides keeps reporting low fluid in a full bottle. No maker documents B011C publicly; the effect is a wrong or missing low-fluid warning.
- What you may notice
- Low-fluid warning stays on although the reservoir is full
- No warning at all when the reservoir runs empty
- Likely causes
- LikelyFloat jammed, rotated out of its guide or soaked with fluid
- PossibleReed contact inside the sensor broken or welded
- PossibleLeaking grommet letting fluid reach the plug, corroded terminals
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €150
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.