The contact owns a 2015 Ford F-150. The contact stated that while the vehicle was parked, the vehicle started to leak coolant. The contact stated that while driving 65 MPH, the engine started to overheat. The temperature gauge registered a high temperature. The vehicle was not taken to be diagnosed. The local dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 148,000.