P0456 Code 2008 Cayenne GTS

[R Stapleton]

Been getting a reoccurring P0456 code stating a small leak in the EVAP system. Changed out the fuel cap and also purge valve on the front left (passenger side) of the intake. Still getting the code popping up. May swap out the Fuel Vapor Sensor Valve in the right rear wheel well, below the fuel door.

Anybody out there run a smoke test and find anything else I should be considering? Possibly a hose or connector?

Hope to get some good input and Thanks in advance!