The contact owns a 2021 Ford Explorer. The contact stated that while driving 80 MPH, the power train warning light illuminated, and the vehicle stalled. The contact was able to exit the highway and the contact was able to pull over to the side of the road. The contact stated that upon turning off and restarting the vehicle, the vehicle operated as needed. The contact stated that the failure had been recurring while driving. The vehicle was taken to Express Care Automotive, where it was diagnosed that a valve in the engine had failed. The mechanic informed the contact that the engine needed to be taken apart for additional diagnostic testing. The mechanic informed the contact that the failure could be related to Ford Campaign Number: 24S55. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 80,000.