Hey there ppl I have a bone stock 08 cobalt ss/tc That wont boost pass 6 psi its bone stock and I have had several cel pop up. But they are both evap codes p0465, p0451 its still got a great warranty still on it just to figure if these two codes could cause boost loss any help is welcome

 

my car was doing the same thing when i first bought it.. but i found the little pcv nipple on my intake broken. I wasn't spitting out the same codes you were, but had the same symptoms.

 

wouldn't hurt to check it.

 

I will definitely take a look at that thsnks ill keep yall posted if that fixes it