What "Not Present" mean with the error code?
 

I feel some light vibrations through pedal and weel and I hear engine knocking, but I don't have any engine light. The OBD2 tool showed me "287D (1/1) Not Present" (see image below)

1. What does "Not Present" mean?
2. Does it mean I need to replace the intake VANOS?

https://cimg2.ibsrv.net/gimg/www.nor...05e898ad19.jpg
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Not sure what the code from your scanner means. Based on https://bmwfault.codes/ code 287D is for intake VANOS over retarded, which would make me think that intake VANOS solenoid should be replaced.

I updated my post with an image from the scanner