On Sat, 19 Sep 2015 05:44:13 -0700, sms wrote:

Can't speak for all states, but in California one of the first steps in
an emissions test is for the codes to be read via the OBD-II port.

I know this intimately not to be true, in the truest sense of what you say.

While many stations will certainly do a courtesy OBD scan, since you can't
pass CA emissions with a given number of pending or set codes or unset
monitors (the numbers of each are depending on the year of the vehicle),
it is absolutely NOT a requirement to run the OBD scan.

Look it up. I did.