Certain 2017-2020 Model Year F-150 Equipped with a 3.5L GTDI Engine Powertrain Control Module Reprogram...

Bulletin number

21B10

Component

Engine and engine cooling

Summary

Certain 2017-2020 Model Year F-150 Equipped with a 3.5L GTDI Engine Powertrain Control Module Reprogram for Cam Phaser Rattle In some of the affected vehicles, an undesirable noise may develop from the cam phasers in the 3.5L GTDI engine. This noise might occur as a rattle when starting the engine after the vehicle was turned off for an extended period of time, or as a knocking noise when the engine is idling after it is warmed up. A cam phaser that has developed an undesirable noise does not affect the vehicle safety, performance, or emissions

Owners of these vehicles have filed 1,478 complaints in the engine category.