Grand Marquis V8-281 4.6L SOHC (1992)
Pressure Feedback Exhaust Sensor: Description and Operation
Differential Pressure Feedback Electronic EGR Sensor
Differential Pressure Feedback Electronic (DPFE) EGR Sensor
The Differential Pressure Feedback EGR (DPFE) transducer/sensor is a ceramic capacitive-type pressure sensor. Exhaust pressure or vacuum is
converted into a proportional analog voltage signal, which is digitized by the Electronic Control Assembly (ECA). The DPFE sensor also monitors
pressure in the exhaust system to allow for an accurate assessment of EGR flow requirements. The ECA uses the signal received from the DPFE
transducer to compute optimum EGR flow rate, as well as to monitor EGR flow.
