NYCZ I would demand that they at least replace the Power Steering module control bd. You have an intermittent dangerous problem. They need to replace the board and see if the intermittent problem goes away. If it does not they can return your old board. i was a electronic copier tech for 33 years. I always trouble shot difficult electronic intermittent problems by trying a board swap. Electronics is electronics demand they try the board swap before someone gets hurt!!