Tony,
Since it was stated from the original post that it went to the dealership with P0302, it has to be assumed that that is what the dealership was supposed to diagnose. If there are other pertinent details, they were not revealed for consideration.
You're giving the dealership way too much credit if you think they hooked up a piece of "highly sophisticated machinery" except perhaps to check the credit line of the customer. Their NGS scanner is no more capable than is Alex's software and a laptop.
Steve
