Oil level sensor leak noted on MOT

I just recently had a Monitor and Repair advisory on Oil leak from oil level sensor [8.4.1(a) (i)].

Does anyone know where the oil level sensor is located on the CEGA engine. I feel it would be a good move to just replace it rather than try to tighten it up because I have for a long time had yellow oil can warning when I first turn on ignition with message Oil Level Sensor Workshop, or similar words. My oil temperature is sending fine, but I suspect some other functionality of device is defective.

I noticed that in my sump appears to be an oil level sensor, but most people refer to it being near or around the oil filter housing.

Have any members encountered the error with yellow oil can symbol, but otherwise not apparent problem? How did you solve it and what part did you need? It would be useful to know for sure where it is located on the CEGA engine. I have replaced the part in the sump several times with different brands so I am not convinced it is the whole issue. It may indeed be a temperature sensor, but some people say the temperature sensor and level sensor are combined. Now with so many different variants of the 2.0 TDI engine it is hard to know without being a specialist or expert of which I am certain there are those of you out there who know exactly the answer.

Many thanks for your time and Happy New Year to all readers and contributors of this great forum.