The contact owns a 2007 Pontiac G6. The contact stated while driving at various speeds, the vehicle lost power steering functionality. An unknown message for the power steering was displayed. The contact was able to pull over to the side of the road. The contact turned off the vehicle and waited for a while before restarting the vehicle. The vehicle was able restarted; however, the failure recurred. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact stated that the failure had gotten progressively worse. The failure mileage was approximately 240,000.