Its on with mine as well, and I Had Gooyear do a diag on it, and its because of the Drivers seat belt, the inside of it has a plastic sensor that goes bad. You have to replace the sealt belt part thats bolted to the floor.
I have a new one, but I think the seat has to come out first, be fore you can unbolt it. They also said your AB wont deploy when that light is on too...
Thats what it was with my 02 edge.