Leak/Hissing Noise near Front of Vehicle

[spacecase]

I've been hearing a slight hiss coming from the front of the vehicle that I don't remember hearing when I first purchased the car. Sounds like a small air leak/hiss and it's coming diretly in front of the engine by the throttlebody. I think a valve went or something but hoping I can get some suggestions (or maybe it's normal?). Have an appointment with my audi service but it's a month out. No codes, only thing I've noticed is my MPG has been pretty low for what I thought it'd be for this car. Video below.

https://youtube.com/shorts/BuyjROYcIPs?feature=share

[awdconnor]

Sounds like a normal PCV induction sound. I to have a hissing sound. No problems on my end

[spacecase]

Sounds like a normal PCV induction sound. I to have a hissing sound. No problems on my end

Thanks, I probably haven't been paying attention to it and just noticed it now. Car is running strong. another thing that's interesting is my intake temp is higher than my charge cooler temp, which is the opposite of how my previous Audi was. I started to go down a thought that the valve is shot and letting in crankcase vapor into the intake tract. Also, when installing my intercooler my cold side had a pool of oil in the piping. I cleaned it and after a week another pool appeared that coincided with a drop in my oil level. Thought this was all connected.

*edit* ended up smelling oil on my drive last night. There's a few TSB tied to this so going to let the dealer sort it out if there is an issue. Will give an update if something's wrong and they fixed.

[DsgDame]

Hey, any update on what the problem was?

[spacecase]

Pretty sure it’s normal. Audi said there were no issues and I even got a smoke test done and found no leaks. The only thing is that on obdeleven/vcds my leakage air is 14.7 lbs/min so I might have a leaking check valve or something.