Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

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 (Lightning)

Courtesy of FORD MOTOR CO.

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

Courtesy of FORD MOTOR CO.

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

Courtesy of FORD MOTOR CO.