00 Boxster 2.7 Ticking EGR?

[vvortex3]

I was getting a ticking noise from the passenger side of the engine. It varies with engine RPM. Disconnecting the electrical connector from a sensor below the driver side intake makes the ticking noise almost entirely dissappear. What am I disabling? How do I replace this part? Some have said something about either an EGR or a "Fuel EVAP Valve". Are these the same thing? Any help is greatly appreciated.