Audi A5 1.8 TFSI: EPC Light and Oil Pressure Warning with Max 4000 RPM - P164B, P164D Errors

Hello,
The car as in the subject lights up while the epc indicator lights up and the oil displays a message with max 4000 rpm. when connected to a computer there are two errors P164B - oil pressure switch and P164D oil pressure reduction valve. Oil is ok, oil pressure on warm 0.8 br, anyone had a similar case? Thinking about this valve anyone knows where it is?

Jaa why yours is similar
Hello, of course there were similar topics but this one has a different thread. the engine showed low oil pressure, after 10 days tow truck and mechanic because he was only on 2-cyl. After dismantling the timing, chain tensioners were replaced, oil pressure sensors, pulse sensor on the shaft and timing, and magnetic on the camshaft. After assembling and changing the oil and filter, attempting to start after a few engine revolutions, difficult starting as if the hydraulics were filling, after pressing the knocks, the engine starts and runs evenly, you can turn off the engine and turn it on forever and it starts and goes like a watch. VAG does not show any errors but what is important the fuel pressure shown by the computer at low speed is about 40 bar, of course, increases and drops (40-160 bar) when changing the RPM after several minutes of engine operation and turning it off (does not go off automatically) no possibility to start engine, the pressure in the fuel system shows about 150 bar, when the pressure drops to about 100 bar, you can start the engine after a few turns. . The fuel pump tappet has been replaced. I point out that the parts listed were new.
Whether anyone has had or has a similar case, the defect expects reliable information

Hallo, wat was het probleem met de oliedruk van deze Audi?
Ik heb hier dezelfde klacht.

Hoor het graag.