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Thanks for the quick response. I try to search but I get a page that says I do not have permision to search. I read alot of threads about code 0420 or similar but i have not seen 0440. so i was curious if anyone had the same code what cured it. I thought maybee a bad seal on the gas cap but i replaced that less than a year ago. did a visual inspection of the vacume system and did'nt see any thing obvious. also, I just replaced maf about a month ago & k&N filter but did not do ECM reprogram. maybe I am getting false code. car runs great after maf replaced.
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