WHEN TURNING ON CAR AT THE FORD DEALERSHIP FOLLOWING REPAIR OF RECALLED AIRBAG THE WARNING LIGHT TO SERVICE ELECTRONIC TRAC SYSTEM. STEERING WHEEL WOULD NOT TURN. SERVICE WRITER CHECKED CODES AND NOTHING CAME UP. I WAS TOLD TO JUST TURN IT OFF AND BACK ON AND THAT WOULD RESET IT. THAT WORKED. IT CONTINUED TO DO THAT ON AND OFF THE NEXT 2 WEEKS. THEN IT WOULD NOT RESET. WE TRIED TO DRIVE IT STOPPING AND STARTING IT TO TRY TO RESET IT. IT SUDDENLY BECAME REALLY DIFFICULT TO STEER AND MY HUSBAND LOST CONTROL AND RAN OVER A CURB ON CITY STREET . LUCKILY NO ONE WAS ON THE CURB OR SIDEWALK .NO INJURIES. FORD SAYS THE ELECTRONIC STEERING IS OUT AND WILL NEED TO BE REPLACED COSTING OVER 18,000$. I HAVE 133,000 MILES ON CAR.