Oil Pressure Light,Low oil pressure light comes on when idle. Check engine light is on as well. Both came on after getting an oil change 3 days ago.

Hello, I have a 2012 Audi A4 2.0t, my low oil pressure light came on in my car but it only come on when I'm idle. My oil is filled to the top. I got my oil changed 3 days ago. It didn't start happening until after I got my oil changed. Also my check engine light has come on. I took it to O'Reilly to get it checked. The code that came up is P2187. They said something about a positive crankcase ventilation valve. Is this related to the low oil pressure or is this a separate problem? What vould ve causing the low oil pressure if i just got the oil changed and my oil is filled to the t