Please post CEL code that you received. It is much harder to diagnose without it.
EGR is not a sensor, but a valve.
It relies on readings from the DPFE (Differential Pressure Feedback EGR) which is the "sensor" for the EGR system.
But code might also be pointing to EVR (EGR vacuum regulator).
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
| 
