TWO CODES : P0442 & PO463

1999 Pontiac Grand Am



September, 24, 2011 AT 10:43 PM

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.


1 Answer



September, 25, 2011 AT 12:46 AM

You might have a bad/loose/leaky gas cap

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