where is the purge valve

i have a code 440 and yes i have changed the gas cap

it has an evap leak. i was not thinking about the gas cap. you need a scan tool, smoke machine and a voltmeter to find the issue. evap problems are one of the toughest to track done. a shop can do this to diag the issue and give you a bid.

can u tell me where it is located in the engine compartmet i have the scan tool and voltmeter