2008 Grand Prix 3800

Asked by Nov 15, 2014 at 02:41 PM about the Pontiac Grand Prix

Question type: Maintenance & Repair

The Engine Idles fine, when you accelerate it falls on it's face, the check engine light is on, code's P0402 and P0420, any suggestions

1 Answer

1,175

Sounds like the exhaust is restricted, have the cat, muffler(s) and pipe(s) checked.

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