I did a smog check at Auto & RV Specialists after a referral from AAA.
However, after doing the check, they said that it failed due to a dashboard panel light on.
They charged me $36.74 for this smog check, and then said told me to return later for a diagnosis ($109.50 for the first hour), then repairs as needed (unestimated cost), and then run the monitors for $54.75 or longer, and then do another smog check for $44.99.
Thinking something was odd, I took the car to another AAA-recommended garage. They said Auto & RV should have informed me in advance that with a dashboard light on, I could not pass the smog check under any circumstances. Thus Auto & RV ran the first test knowing I would fail, in order to charge me for two smog checks plus repairs.
This is unethical, and I have let AAA and the BBB know about this. I would advise people to go elsewhere for their smog check if you think there is any chance of failing it on a technicality.
(And even if you can pass, they essentially have no waiting room -- just a chair in the corner. It's not a very comfortable place.)