I THINK the odometer reading is contained withing the PTCM. I have never read of a way to verity it OR change it.

Of course, if the PTCM has been changed, possibly it would start out with 000000.0 again, but I would think the dealer would set the mileage to what was in the old one, if possible.

Maybe Rudy or someone will show up with the real answer, but again, I don't think there is a way to "verify" it.