your car is still new and it is possible you have a small vacuum leak and not notice it given if you did no install it correctly. Recheck all connections, clear the code and see if it comes back. Have one of the techs do an EVAP test using the IDS and see if they can isolate an issue with the EVAP system. I have encountered several new Foci (<5k miles) with EVAP concerns, I have replaced many Canister Purge Valves as they tend to stick slightly open and get stuck which causes a leak.
Ford, Lincoln & Mercury Certified Automotive Technician
'13 Focus ST
'12 Subaru Forester
'91 Mercedes 560SEL