we have a broken old hand held box at work for reading error codes just sitting there. makes ya wonder how much its worth :) they have a much better device to read the codes at Ford now. And a whole laptop that sits on the steering wheel for AU's. AU ECU's can be reprogrammed at Ford Dealerships as they have EPROM? programmable memory unlike anything before it. So if they have a problem they can be fixed with a patch even by a apprentice