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1996 Pontiac Sunfire Question: P0442, Help, fix for emmmision.

 

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Alex08, 2.2L 4 Cylinder, Youngstown, NY, June 11, 2014, 18:46
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Change gas tank and erase OBDll, check gas filter and tank for leakers and found nothing, however, it come back

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    csubak30 June 11, 2014, 18:55
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     Master

    Most likely causes are: fuel filler cap is loose and need a new one due to gasket wear, fuel filler neck has rusted and there is a hole breaking the vacuum or an evap system hose is leaking. Best way to find the leak is with a "smoke test" at a shop.

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  • Answer #2

    ziptie12 June 11, 2014, 19:38
     Master

    . . vm.

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