Diagnostic Aids

Perform this test when instructed by QUICK TEST. This test is only intended to diagnose:

• Differential Pressure Feedback (DPF) EGR Sensor
• Faulty EGR Valve
• EGR Vacuum Regulator (VR) Solenoid
• Orifice Tube Assembly. See Fig 1.
• DPFEGR Sensor Pressure Hoses
• Vacuum Lines
• Wiring Harness Circuits (DPFEGR, EVR, EVR PWR, SIG, SIG RTN & VREF)
• Faulty Powertrain Control Module (PCM)

Fig 1: Identifying DPFEGR System Components

Courtesy of FORD MOTOR CO.

Fig 2: Identifying DPFEGR Sensor Wiring Harness Connector Terminals (Continental, Cougar 2.5L, Crown Victoria NGV, & Econoline, Excursion & Pickup 5.4L - California)

Courtesy of FORD MOTOR CO.

Fig 3: Identifying DPFEGR Sensor Wiring Harness Connector Terminals (Explorer, LS, Mountaineer & Thunderbird)

Courtesy of FORD MOTOR CO.

Fig 4: Identifying DPFEGR Sensor Wiring Harness Connector Terminals (All Others)

Courtesy of FORD MOTOR CO.