Ford F-150 DPFE Sensor Replacement

How to Replace the DPFE Sensor on a Ford F-150

The DPFE, or Differential Pressure Feedback sensor is a critical component of the exhaust gas recirculation system (EGR). The sensor may alternatively be listed as the "delta" pressure feedback sensor. Its purpose is to measure the pressure difference between two points on the EGR feed tube/exhaust inlet. The PCM uses this pressure differential to determine the correct flowrate of exhaust gases through the EGR valve based on the current operating conditions. When the DPFE fails or begins to provide the PCM with faulty information, the EGR duty cycle cannot be adjusted properly. A DPFE sensor failure is often identified by a P0401 or similar diagnostic trouble code, identifying insufficient EGR flow.

Applicable Model Years: 1997 - 2004 4.2L V-6, 4.6L/5.4L V-8 Ford F-150
Differential pressure feedback sensor (DPFE): Motorcraft/Ford part # DPFE15 (F77Z-9J460-AB)

 

Note - there are two types of sensors, those that bolt to the firewall and those that "float" on the feed tubes. The following procedures are based on the floating type, although the procedures are identical save for the need to unbolt the sensors that are secured to the firewall.

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DPFE location

• Disconnect the negative battery cable.

• Locate the DPFE sensor. It is positioned to the left of the brake booster up against the firewall and has two metal tubes running from the EGR valve supply line and into the DPFE sensor. Note that some sensors will "float" above the tubes, while others may actually be fixed to the firewall by (2) bolts.

DPFE removed

• Unplug the electrical connector from the DPFE sensor, then remove the sensor. If the inlet hoses are tight, gently move the sensor side-to-side while pulling. Be cautious not to break off the plastic nipples on the sensor.

Replacement DPFE installed

• Install the new sensor in reverse order, making sure that it is fully seated in the inlet hoses. If desired, you can secure the lines with zip ties or hose clamps.

• Reinstall the negative battery cable, start the truck, and verify everything is functioning properly (i.e. no check engine light, DTCs).