TWO CODES : P0442 & PO463

1999 Pontiac Grand Am • 110,000 miles

These two codes are consistently coming up together P0442 & PO463 even when resetting system. Would this mean I have only one problem? / I understand from researching the codes that I most likely have a leak. Could you please advise where the leak is most commonly detected on this car please?

I Thank you very much for any help you can provide as I can not find full time work in this economy and am stuck trying to figure this out myself so I can pass emissions or my family will soon be without transportation. Sorry I can not make a donation for you.

September 24, 2011.

You might have a bad/loose/leaky gas cap

Sep 25, 2011.