Power Steering Light On problems of the 2012 Lincoln MKS

Tl- the contact owns a 2012 Lincoln Mks. The contact stated that while coming to a stop, the wheel steering became drastically difficult to control after an audible and power steering warning light illuminated. The contact stated that the failure happened only once. The vehicle was switched off and was able to restart after the failure. The vehicle was taken to a dealer where it was diagnosed but the failure was not determined. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was 39,000. Jo.