I'm getting a p0455 (EVAP large leak) Replaced the gas cap & still get the same

Could be electrical control issue with purge solenoid or cvs valve. Being able to read live data would be a plus in diagnosing. How long (miles , drive cycles) does it take for the code to return? Dealer might be best bet for proper evap system diagnosis.

hi, i had i friend that has the same car and there was a cracked hose by the air cleaner also he had pinholes in the filler pipe it is hard to see i had a least three fords that had this problem