I don't think the recall Will cover the plenum, The advice not to have the AEM is questionable ,Because NOW you can't have the AEM with those codes Unless your 5/100K miles warranty is up and maybe just maybe it possibly would have helped to have the 4/48K miles of the AEM at least the dealer would not be able to charge you for the Code Checking with AEM Warranty, I would clean the map sensor and go from their, My guess the plenum is soot up and the swirl valves are sticking plus the likelihood the diffuser tube is sooted up.
Not to mention time is going to expired for the $3,075 Cash AEM...IMO the Dealer really screwing you over with bad advice..... You still would qualify on the Final Court Date May 3 2019 on the 21 month submittal and 24 months install, Submit ASAP.
The EGR recall is NOT for Emissions its a safety recall.