Then why would the dealer say "They were unable to use the diagnostic fault finder and would not be able to use this tool in the future on the car due to the changes."

__________________
"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….