it could be, but you'd have a check engine light. a few of us actually were talking about this in another thread not too long ago, and the solution we came up with was that the pcm throughout the years accounts for "wear and tear" on drivetrain components and changes things like fuel trims and transmission line pressures. solution: leave the battery unhooked for a few hours, or overnight. it drains all power from the pcm and resets to factory defaults. it worked for me and a couple other people