Seems to be a common 2018 3.5l problem, figured I would let you guys know what your customers are saying and have going on.
http://www.f150ecoboost.net/forum/129-2018-ford-f150-ecoboost-chat/61010-2018-3-5l-5-star-tuning-n-guage.html
http://www.f150ecoboost.net/forum/129-2018-ford-f150-ecoboost-chat/61010-2018-3-5l-5-star-tuning-n-guage.html