I started my 2003 F250 Ford V10 eng with 105K miles. One owner, looks new. The check eng light came on and stayed on. I took it into the Ford place here in Yuma and 3 hrs later they said I need a new ...
If the truck still runs fine then why replace the board even if it is "bad". Just drive it. I know people who have driven vehicles for years with the check engine light on.