Hi, I have a 2007 grand prix gt, the the check engine light was sometimes coming on and turning off every month or so, I never looked into it because it would stay on for a week and go off back to normal for a month. Now I had my friend scan it and I guess the codes are for the MAF waste gate and I forget the other. But I just noticed the gauge doesn't let it hit full boost. Anyone run into this problem? I really hope its a cheap fix like a vacuum line or something.
Also when the check engine light was on the tranny would shift hard, even if you give very little gas it would shift hard.
I hope someone can help me fix it, thx
