Hey everyone I just purchased a 2008 Audi a4 2.0T 3 months ago and two days ago I started hearing a whistling noise so today I herd it again and I popped the hood and pulled out the oil dip stick and the noise went away then put it back and it whistled again.

I been reading that it could be the pcv valve just want to me sure

I also read that Audi had a recall for this is that true and if it did will Audi still fix my car or am I out of luck .