Was having a problem with the OIS when I was Beta. Talked at lengthen to a BAR engineer. We talked about the Ref deal.
This is what I got from him, (no I don't remember a name) They look at the math. The math has been changed, then it locks the vehicle out and send it to the Ref.
It has been "Chipped\Reprogrammed\What ever. The computer, Known math from the factory, has been changed, the vehicle get's flagged.
They could also be looking at vehicle, (the older Mustang) that have been done at roadside inspections. Vehicle that looked funny at a Car Show.
What I got was and if I can find it, I have a picture of what is printed out on a Nissan that tried. I will put it here.
Shop down by LAX would do it for $400.
Guy came back and told me I was right.
Life will give you rope. It will give you enough to make a ladder to pull yourself up, or an noose to hang yourself with.