This article supersedes TSB 18-2249 to update the vehicles affected and production fix date. Some 2018-2019 F-150 vehicles equipped with a 2.7L EcoBoost and built on or before 15-Mar-2019 may exhibit an intermittent lack of engine revolutions per minute (RPM) when coming to a stop while towing. This may be caused by the engine running leaner than expected under certain deceleration conditions. To correct the condition, follow the Service Procedure to reprogram the powertrain control module PCM.
