Sofa Slug wrote in :

VW sneaked in the defeat
device software to detect when the car is hooked up to a dynamometer

What I'm surprised at is that each state can have a *different* procedure.

In California, they use the dyno, but in many less technical states, they
still use the dumb procedures.

This explains how they noticed there was testing going on.
http://www.latimes.com/opinion/edito...919-story.html
http://www.rocketnews.com/2015/09/did-volkswagen-cheat/

But that only works for the intelligent states.
How did they also fool the low-tech states like NJ, Kentucky & Kansas?