2001 Ford Taurus How to fix MIL code P0401

COLDWATER

MEMBER
2001 FORD TAURUS
6 CYL
FWD
AUTOMATIC
73,800 MILES

My MIL light came on so I scaned the engine and the MIL code was P0401. Exhaust Gas Recirculation Flow Insufficient Detected. Does this mean I need to replace the EGR valve?

3 Replies

DAVE H

EXPERT

Check/clean/replace DPFEGR sensor

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. 75.
DPFEGR Sensor Pressure Hoses
Vacuum Lines
Wiring Harness Circuits (DPFEGR, EVR, EVR PWR, SIG, SIG RTN & VREF)
Faulty Powertrain Control Module (PCM)
Fig. 75: Identifying DPFEGR System Components
Courtesy of FORD MOTOR CO.

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Thursday, December 18th, 2008 AT 7:03 AM

JASONRAY

MEMBER

Don't mean to butt in but it's ALWAYS ALWAYS ALWAYS the DPFE sensor. Remove it and take the 2 hoses off. Tap it on a dry surface where the 2 hoses attach. If ANY MOISTURE whatsoever comes out, replace it. Replace the two hoses if you can find them. I replace them ALL THE TIME on Fords.

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Wednesday, December 24th, 2008 AT 5:56 PM

COLDWATER

MEMBER

Dave you were right on about the DPFEGR sensor. I replaced it and cleared the MIL code. After driving all day the light never came back on. Rescaned the engine and the system monitors checked off the EGR. I would recommend this site to anyone. Saved me a lot of money. Thanks. Hello Jasonray. You can jump in anythime with good advice.

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Sunday, December 28th, 2008 AT 4:07 AM