2005 Buick Park Avenue Q&A

2005 Buick Park Avenue Question: Check engine light comes on frequently with code PO455.

It's not the gas cap. Could changing the Canister Purge Valve solve the problem? I reset the code about 4 times per tankful of gas. -
Answer 1
these can be very involved and exp to guess, i rec you have it ck'd by a good mech and save time and $ -