Question about 2006 Ford Fusion

3 Answers

I have a code po401 - 2006 Ford Fusion

Posted by on

3 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Sniper:

    An expert who has posted more than 50 answers, of which 90% or more were rated as helpful.

  • Expert
  • 71 Answers

The P0401 is an insufficient flow code and is almost always caused by the DPFE sensor. This sensor measures the back pressure in the exhaust as is a more accurate way of determining EGR flow than the old EGR position sensors. When the EGR valve opens the exhaust back pressure changes and the DPFE sensor informs the processor of this information. If the sensor isn't reading a change when the EGR valve is turned on through the solenoid, it will throuw a p0401 code. The only true way to check this is to install a scan tool and measure the DPFE voltage. Normal DPFE voltage is approx. .9 volts at idle.
The DPFE sensor dealer part price is approx. $140 but you will find cheaper prices at an aftermarket parts store. Good luck.

Posted on Apr 04, 2011

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,915 Answers

Your car is not that old, but you need to look at the EGR system (insufficent flow) since that is what the code is pointing at-it us usually caused by carbon buildup blocking the valve/tube so that it will not open as it should, or possibly a harness for the solenoid or it's connector is bad. You can try clearing the code first to see if it comes back (disconnect the negative terminal at the battery or pull the ECM fuse for 5 minutes).

Posted on Apr 04, 2011

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 3,400 Answers

It's an EGR valve issue - either the valve itself is plugged with carbon or the passageway is. You'll need to disassemble and inspect. Carbon is like concrete to get out, you might be looking at replacing EGR valve.

Posted on Apr 04, 2011

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Kept getting a code po401


Did you check to make sure the ports going and coming from the egr are open, not clogged with oil and carbon deposits ? Common failure is a clogged port.

Jan 14, 2015 | 2003 Hyundai Santa Fe

1 Answer

Egr valve code PO401


the EGR should be somewhere on your exhaust manifold

Dec 20, 2013 | 2003 Buick Rendezvous

1 Answer

Egr PO401


Code 401 is for low EGR air flow. The EGR valve allows exhaust gas to be recirculated back thru the intake and reburned.
The problem could be the EGR valve, the sensor, or a blocked line.

Jun 29, 2013 | Dodge Ram 1500 Cars & Trucks

1 Answer

Toyota troubleshooting code PO401


Try to clean,it is EGR valve.Tubing too.

Jun 18, 2013 | Toyota Camry Cars & Trucks

2 Answers

How to fix code po401 and po 340


here's a link to some information on the codes you asked about
P0401
P0340

good luck!

May 18, 2011 | 1996 Toyota Camry

1 Answer

I have a 1997 chevy lumina. i had 2 coded before, po420 and po401. i changed the egr valve, and now the po420 is gone. i just replaced the egr tube, cleared the codes, and now the po401 is back. car sounds...


Well, the po401 is saying is that the egr valve has restricted flow. After changing the egr and the tube, something else is causing the restriction. a more thorough diagnosis is recommended. The po420 code sounds like a possible catalyst failure or an o2 sensor failure.

Oct 16, 2010 | 1997 Chevrolet Lumina

1 Answer

Engine light on code reads po401


I believe this code is insufficient EGR flow. On this engine, the passages to the EGR valve often become carboned up and cause this code. Remove the EGR valve and inspect the passages to see if they need to be cleaned.

Jun 14, 2010 | 2006 Ford Mustang

1 Answer

2004 Mercury Monterey 70k CEL code PO401


po401 egr flow insufficient vaulve could be stuck or disconected

Mar 02, 2010 | 2004 Mercury Montery

2 Answers

Mercury sable 2001 duratec engine DOHC I get check engine light and diagnostic code PO401". Any suggestions?


Barring any vacuum leaks, P0401 is indicative of a bad EGR valve. Hope this answers your question. Best of luck.
Greg

May 30, 2009 | 2001 Mercury Sable

Not finding what you are looking for?

Open Questions:

See all 2006 Ford Fusion Questions

2006 Ford Fusion Logo

515 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75797 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22114 Answers

fordexpert

Level 3 Expert

5495 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...