Hi Sir or Madam, I am John Mc, a Ford dealer technician.I hope I can help solve your problem quickly and accurately.
What year explorer and what is going on with it? Did something happen where it would not start?
If you have any more questions please feel free to ask, it's what I'm here for!
important to me so please leave accurate feedback for others to see my job performance.
Sometimes when changing the battery the computer loses memory of the coded keys. Unfortunately you have to have a dealer or locksmith reprogram the system. This is a very complex system and it was designed so you had to take to a professional to repair or reprogram. Sorry for the bad news but trying to do it any other way would be a waste of time and you really do need specialized computer equipment and software.