Thats nice and all, but I had a code run on my ford not more than 2 weeks ago in vacaville. Used to have them run all the time in Sacramento, but that was a while ago. I'm not saying whether they do or not, but its always worth checking. The worse they can do is say no.
I went the other day to Auto Zone here in OR and they said they still do the scanning but not on my '88. Too old!