2003 Oldsmobile Alero
Problem for Oldsmobile 2003 Alero

I'm getting a code p0440 i replace the gas cap but




By henry_holmes on Jul 02, 2009

" "
i'm getting a code p0440 i replace the gas cap but my engine light came back on same code can someone help me and let me know what to do next

Best Solution

posted on Jul 02, 2009
Helpful)

diagjunkie

Rank: Guru 
Rating: 93%, 61 votes
well if you bought a good gas cap and the right one you need to check for a leak at the evaporative lines check the pcv valve and for any vaccum leaks if that is not it you could have a bad evap vent selonoid or bad charcoal canister. it is a simple diagnostic if you had a scanner and a smoke machine.
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