VSC and ABS lights on no codes so dealer was $200 diag fee

The abs and vsc lights have been going on and off for a few weeks. I waited untill the lights were on and stayed on so the dealer could get any codes because they have said they cant read them if the lights are off. So they come back after 20minutes and tell me that the lights are on but their computer says there is no problem. That means to them there is some communication problem and they need at least $200 and 2 hours to figure out the communication problem. Then they can start figuring out why the abs and vsc lights are..
I could care less about my car communicating with their computer. Yet here i sit, waiting for nothing.