High pitched noise

#1
Hey everyone!
I own a 2005 Toyota Corolla and lately the car has been making a high pitched noise wheneverI go over 35 mph. I have also been experiencing high gas consumption because of it. I got a code that said the system bank was too lean and I had the intake manifold gasket replaced, and it still sounds like it's sucking in air! Any comments or suggestions would be great!

Thanks!
 
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