The 258 codes being flashed by the display and steering moduals are for communication fails (CAN) between them. You will probably want to check control cords through the mast first. Other thing to check would be battery. If battery voltage drops to low one or both of them could flake out for an instant and loose communication
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.