Some 2015 Lincoln Navigator vehicles equipped with a 3.5L engine and built on or before July 17, 2015 may exhibit a MIL on with DTC P0087 and possible loss of power. Using the Ford Integrated Diagnostic System (IDS) or equivalent scan tool, check for DTCs.
If P0087 is the only DTC present, replace the fuel injection pump P/N BL3Z-9350-C, the two mounting bolts W503297-S900 and nut W520100-S437.