[b_boi24]

Hello, I'm having a problem trying to figure this p1441 code my car keeps throwing. First off, it's a 96 fwb w/85k mi. I replaced the purge valve 1st,the charcoal canister 2nd, the pressure valve and hoses 3rd, and recently the gas cap, all w/ oe parts from gmpartsdirect. After replacing every part mentioned, the ses light always seems to come on shortly after a cold start. Drivability is not really an issue besides mpgs are down. Some slight hesitation at first but then smooths out. Like I said, I've replaced every part I could think of, am I missing something? All thoughts and advice are appreciated, thanks in advance.