NHTSA Complaint #11449507 — 2020 FORD F-250

The contact owns a 2020 Ford F-250. The contact stated that while driving approximately 55 mph on the highway, the check engine warning light illuminated, and the vehicle went into limp mode causing the speed to suddenly reduce to 30 MPH. The vehicle was taken back to the dealer who diagnosed that the failure was due to an engine software update. A software update was performed but the failure reoccurred. The vehicle was taken back to the dealer and the NOX sensor was replaced; however, the failure reoccurred. The manufacturer was notified of the failure and the contact was informed that an engineer would be sent to examine the vehicle. No further information was available. The vehicle was not yet repaired. The failure mileage was 72,000.