Were any lights (headlights, parking lights, DRL's) on when you tried to do the reset?
They have to be off for it to reset. The trip meter also needs to be displaying Trip A.
If they were not on and you started with the doors closed, key off, held the button down, turned the key on and held it in for fifteen seconds.
Try it a few times, as it may not reset on the first try.
The other option is to use a scan tool to reset it.
Friday, November 3rd, 2017 AT 11:59 AM