2003 Sonata Stalling

My 2003 Sonant has started stalling. While I am driving, there will be a clicking sound from behind the radio/temp controls like a solenoid is trying the catch, and then the car hesitates and sometime stalls. This happens while I am driving.

Service says there are no codes in the computer on test. Anyone having the same issue? Anyone know what electrical is behind the radio/temp controls that may make a clicking sound?

Thanks!

Behind there? All that's back there on mine is the alarm/remote lock system. I don't know if anything was added for 2003. It's easy enough to look, though, all that's holding the dash peice consisting of the radio and HVAC controls are little clips. So just carefully pry it off and check it out back there.