Hello to each other! Have an Audi A4 B8 Bj 2008 with a 2.0TFSI (CDNC) engine here. It brings the message “Check oil level” ONLY! with warm engine. When reading out it shows, “Oil pressure switch for low oil pressure”. There are already some topics that I have found about the search. But at least it runs out of a dirty oil sieve. But this was not the case with me. I have already exchanged both oil pressure switches, the oil level sensor and the oil pressure regulator. When it is cold, it has (with analog oil pressure manometer) in the stood approx. 2.0 bar and over 3500u/min approx. 4.0 bar. If the engine then reaches operating temperature, it sinks in idle to partly below 0.5 bar, although it still goes over 3500 u/min up to 4.0 bar. Is there any experience? Thank you very much!