I had a hypertech on a 2001 psd and it could not read codes. To re-set it back to stock you plugged in and followed directions as they came up on the screen. It wasnt to hard and then vise versa to put program into truck.I see you say you have a 2000, some of those programmers can NOT be used in other years so be careful of that. I would contact hypertech to find out first.