Check engine light came on.....checked it...brought up codes P0440 Evap emissions control system malfunction...and P0446 Evap emmisions control system vent circuit malfunction. Naturally...I replace the gas cap....which had a worn seal...reset the comp....then 2 days later...check engine light comes back on....and same 2 codes come up. Any suggestions on what else it could be?

Depending on what year the veh is it may be the fuel filler tube.