Need vacuum line diagram for 2002 Park Ave due to code P0440

Asked by Greg Apr 19, 2014 at 07:47 AM about the 2002 Buick Park Avenue FWD

Question type: Maintenance & Repair

Code P0440 indicated after changing gas cap

2 Answers
200,965

dandyoun answered 10 years ago

http://www.obd-codes.com/p0440 -- check this out for possible solutions. Also your vacuum hose diagram should on a sticker either attached to underside of hood or alone the front rail of engine compartment.

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yetilikesbeer answered 10 years ago

Did you put a factory cap or factory replacement back on or a new generic cap. Most older vehicles require a vented cap. Newer vehicles with emissions need a sealed cap, the tank is vented through the vapor system. If the car can draw air through the cap it thinks there is not one there!

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