Some 2019 F-150 Limited vehicles built on or before 1-Jun-2019 equipped with a 3.5L EcoBoost high output engine may exhibit a lack of power and/or misfire condition with or without diagnostic trouble code (DTC) P0300 through P0306. This may be due to the internal components of the muffler assembled improperly. To correct the condition, follow the Service Procedure steps to replace the muffler.
