Some 2021 F-150 vehicles equipped with equipped with a 3.5L EcoBoost or 3.5L PowerBoost and built on or before 31-Mar-2021 may experience an external loss of coolant. This may be due to a leak in the degas bottle hose between the degas bottle and thermostat housing. To correct the condition, follow the Service Procedure to inspect and replace the left degas bottle hose between the degas bottle and thermostat housing.
