Tl* the contact owns a 2018 ford f-150. when the contact placed the vehicle into reverse, the park aid warning indicator illuminated and the back-up sensors failed. the vehicle was taken to imperial ford (8 uxbridge rd, mendon, ma 01756, 888-814-8373) to be diagnosed, but the failure could not be duplicated. the vehicle was not repaired. the manufacturer was not notified of the failure. the failure mileage was approximately 15,000.