Your smog guy sounds like he knows what he’s talking about. Undoubtedly he hooked up his scanner and determined that one or more of your monitors hasn’t run to completion. The evap monitor isn’t easy to complete. The evap monitor will only run at certain temperatures and the fuel level must be between 15% and 85%. So don’t run on fumes and don’t top off.
Here’s my advice for completing the evap monitor. Fill fuel so that the tank is about 2/3 full.
Tomorrow morning, start the car and let it idle with no AC for about 5 minutes. Then drive normally to work. Steady driving, no rapid acceleration. For the next few mornings, let it idle for 5 minutes before setting out. And don’t let the fuel level get too low.
I suspect the 200 mile thing has to do with the catalytic converter monitor. Steady driving at freeway speeds should do the trick. I’m talking 65, not 85. Cruising, not racing or weaving in and out.