The contact owns a 2021 Ford F-150. The contact stated that while attempting to complete a turn, the steering wheel seized, with the ‘Steering Assist Fault Detected’ message displayed. The vehicle was restarted and returned to normal functionality, but the failure became a regular occurrence. The power steering warning light was illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V407000 (Steering), but the VIN was not included. The manufacturer was notified of the failure, a case was opened, and the contact was referred to the NHTSA Hotline for assistance. The failure mileage was 19,000.