I know it doesn't "recognize" the head but I can't figure out why or what happens. While operating in the field it will start flashing the code along with the yellow header light coming on. It also kicks out my auto header height control. I've checked the wire connection at head and it seems good. Turning the key off and back on will reset it and it will work for a while. It seems like I had this problem on a previous combine. I want to say it could be one of those black boxes that are mounted on top of the combine throat but I'm not sure witch one, if it is. Any help would be greatly appreciated. Thanks!