Lost Keyless Entry
 

Last year I lost one of my keyless entry fobs for my CX-9. Now, the second fob has disappeared IN MY CAR! The car still starts & stops normally but of course I can't lock it. I have scoured the car 3 time, removed mats, put seats up and down but to no avail.

Is there a transponder or system that will "ping" to the remote that is hidden somewhere in the car and beep or signal in some way?