Differential Pressure Feedback EGR (DPFE) Sensor
WARNING: This page is about a different car, the 1995 Mercury Sable, 1995 Mercury Cougar, 1995 Ford Thunderbird, and 1995 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
DPFE sensor monitors exhaust system and generates a varying electrical signal proportional to exhaust pressure. This signal is sent to the PCM where it is translated and used to compute correct EGR flow.