Egr problem , 1997 mercury mountaineer 5 liter. egr system not a dpfe system, no egr tube, ports into the intake elbow. replaced egr valve egr postion sensor, checked the egr selonoid for resitance showed 30 ohms. set code off shortly after starting back up.

Question 1

0helpful

1answer

What is the function of the DPFE in a 2003 ford expedition?

Delta Pressure Feedback of EGR (or DPFE) is the difference or change in the EGR system pressure. The DPFE Sensor reads changes in the pressure of the EGR system.

There's a vacuum line coming off the intake manifold to the EGR actuator. The actuator is on the firewall and it's an electric device controlled by the PCM that modulates how much vacuum pressure gets past it. From there, another hose goes to the EGR Valve. Vacuum pressure opens the EGR Valve, allowing exhaust gases to be pulled from the exhaust manifold, past the DPFE tubes, then back into the intake manifold. When gas flows through the EGR tube, the two tubes leading to the DPFE Sensor get pressurized. There's a differential in the pressure, one tube has more pressure than the other one. The DPFE registers the amount of pressure difference and can tell how much exhaust gas is flowing through the EGR system. It tells the PCM how much is flowing, and The PCM uses this reading to control the actuator.

Mar 17, 2014 • Ford Expedition Cars & Trucks

0helpful

1answer

I have po401 code that show up what shall I look for to fix this problem

There are two tubes from the Exhaust to a sensor called the DPFE, make sure they do not leak.

Unplug the wires to it, make sure the terminals are not corroded, clean them anyway, try it again.

Replace the DPFE sensor if no good, also replace both tubes (hoses) as they will most likely break when you take them off.

On vehicles that are no well maintained you also wany to remove the EGR valve and make sure the ports are not clogged.

Oct 23, 2013 • 2002 Mercury Mountaineer

0helpful

1answer

Code P1405

I have copied the entire description for the code.
Let me know if you need more info. You may need a shop to take a look at the system.

P1405 Ford Description
The purpose of the Exhaust Gas Recirculation (EGR) system on your engine is to limit oxides of nitrogen (NOx) emissions. This is done by redirecting small amounts of exhaust gas back through the upper intake to get mixed in with the air/fuel charge. The resultant diluted air/fuel mixture (i.e., less oxygen per cubic foot) burns cooler and combustion chamber temperatures are reduced accordingly, thereby lowering NOx emissions.
The Ford DPFE/EGR system is controlled by the Powertrain Control Module (PCM). The system employs an EGR Valve, an Electronic Vacuum Regulator (EVR), and a Delta Pressure Feedback EGR sensor (DPFE).
The DPFE Sensor measures EGR flow across an orifice located inside the special EGR Tube. The orifice is positioned between two hose ports coming off the tube which are connected to the DPFE sensor with special heat-resistant hoses. When the EGR Valve is open, a pressure differential is created across the orifice (intake manifold pressure vs. exhaust pressure). By design, this difference in pressure is measured by the DPFE sensor in terms of voltage. The DPFE voltage signal output to the PCM is directly proportional to the flow of exhaust gas entering the intake manifold.

Read more: http://engine-codes.com/p1405_ford.html#ixzz2dUIwIiDd

Aug 30, 2013 • 2004 Ford Taurus

0helpful

1answer

1997 mountaineer 5 liter motor ,how to replace egr valve, find location

I have the 97 built in 96' (non DFTE) and the EGR valves is just to the left of the Transmission dipstick.

May 13, 2012 • 1997 Mercury Mountaineer

2helpful

2answers

Have 1999 Mercury Sable and failed emissions for P0401 code, I replaced the EGR Valve and had the code reset, service engine light came on again Approx 15 miles later. Took it to Auto Zone and they gave...

I am not surprized. The chances that replacing an EGR valve will fix a code P0401 on ANY Ford vehicle is about 1/2 of 1 percent. You most likely either have clogged up EGR ports in your intake manifold, or you have a defective Delta Pressure Feedback EGR (DPFE) sensor.

To find out which it is, apply vacuum to the EGR valve vacuum port with the engine idling. The engine should stumble and/or stall. If it does not, your ports are clogged. If it does, the most likely cause of your problem is the DPFE sensor. However, the EGR vacuum control solenoid could also be the cause.
You cannot properly test the EGR vacuum control solenoid without the proper equipment, but you can check to make sure that there is manifold vacuum going into one side of the solenoid and you can check to make sure that there are no breaks or leaks in the line that runs between the solenoid and the valve. If you find any of these, repair as necessary. If you do not find a problem with the vacuum lines, then you can take a "guess" and replace the DPFE. If this does not work, then you can "guess" again and replace the solenoid. If it still does nort work, then you probably have a bad electrical circuit to the solenoid (once again, requiring the proper equipment to diagnose).

Please also review the following article: What Else Could Be Wrong?

Nov 18, 2011 • 1999 Mercury Sable

1helpful

1answer

Code p0401 i replaced egr tested omhs@voltage on all related parts @reset code still comes on ?

What have you replaced the EGR valve or the DPFE sensor. The valve usually never goes bad it is usually the DPFE sensor that is bad or the ports in the intake elbow that the valve is bolted to are plugged. If the DPFE tests good pull the elbow and clean the ports. Do you have a vacuum pump?

Dec 10, 2010 • 2000 Ford F150 Flareside SuperCab

1helpful

1answer

2002 Mercury cugar P0401 and P1401

DTC P0401 - Insufficient EGR Flow

EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Causes: A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions: In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve

DTC P1401 - Differential Pressure Feedback Electronic Sensor circuit High Voltage

I think that you need a new DPFE; first check it, you could also have something restricted. There are ports in the throttle body that can cause this as well. Check THIS LINK.

Hope helps.

Nov 04, 2010 • Mercury Cougar Cars & Trucks

6helpful

1answer

2001 mercury engine code P0401

DTC P0401 - Insufficient EGR Flow

What does that mean? EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Symptoms: You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.

Causes: A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions:
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve

Hope helps (remember comment and rated this).

Jul 14, 2010 • 2001 Mercury Sable

1helpful

2answers

What does a PO401 means for a 1998 Mercury Sable

P0401 OBD-II Trouble Code - Insufficient EGR Flow

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Symptoms
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.

Causes
A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve

Hope this help to solve it; remember comment and rated this help. TY for using Fixya.

May 06, 2010 • 1998 Mercury Sable

10helpful

4answers

Emission inspection report list a code 401 as the problem.where should i start to correct the problem

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.

Take it for a test drive.

Please rate my answer if it's useful to you.

Cheers,

Mustgo

Sep 24, 2009 • 1996 Ford F150 Regular Cab

Question 2

fordexpert

Mercury Master 5,692 Answers
Posted on Sep 24, 2009

fordexpert

Mercury Master

Joined: Apr 20, 2009

Answers

5692

Questions

1

Helped

1974146

Points

17063

Check the passages under the airhorn. When carbon builds up the diagnostic blames the EGR for not opening and throws a code. Actually there is no flow to the EGR because the port is clogged and the diagnostic measures the flow after the EGR.

They really needed to have a sensor before and after the EGR. Also remember to disconnect the battery for 10 minutes to remove old info.

Answer 2

Vincent G

Mercury Master 2,363 Answers
Posted on Dec 19, 2009

Vincent G

Mercury Master

Joined: Jul 09, 2009

Answers

2363

Questions

4

Helped

1032356

Points

5917

Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.

Take it for a test drive.

Please rate my answer if it's useful to you.

Cheers,

Mustgo

Related Topics:

Trustworthy Expert Solutions

Egr problem , 1997 mercury mountaineer 5 liter. egr system not a dpfe system, no egr tube, ports into the intake elbow. replaced egr valve egr postion sensor, checked the egr selonoid for resitance showed 30 ohms. set code off shortly after starting back up.

2 Answers

fordexpert

Vincent G

Add Your Answer

Attachments: Added items

Related Questions:

What is the function of the DPFE in a 2003 ford expedition?

I have po401 code that show up what shall I look for to fix this problem

Code P1405

1997 mountaineer 5 liter motor ,how to replace egr valve, find location

Have 1999 Mercury Sable and failed emissions for P0401 code, I replaced the EGR Valve and had the code reset, service engine light came on again Approx 15 miles later. Took it to Auto Zone and they gave...

Code p0401 i replaced egr tested omhs@voltage on all related parts @reset code still comes on ?

2002 Mercury cugar P0401 and P1401

2001 mercury engine code P0401

What does a PO401 means for a 1998 Mercury Sable

Emission inspection report list a code 401 as the problem.where should i start to correct the problem

Not finding what you are looking for?

1997 Mountaineer

What is the function of the DPFE in a 2003 ford expedition?

Ask a Question

Check Out the Latest Top Trucks Report!

Top Mercury Experts

ZJ Limited

Ronny Bennett Sr.

Thomas Perkins

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

Manuals & User Guides

Related Topics:

Trustworthy Expert Solutions

Egr problem , 1997 mercury mountaineer 5 liter. egr system not a dpfe system, no egr tube, ports into the intake elbow. replaced egr valve egr postion sensor, checked the egr selonoid for resitance showed 30 ohms. set code off shortly after starting back up.

2 Answers

fordexpert

Vincent G

Add Your Answer

Attachments: Added items

Related Questions:

What is the function of the DPFE in a 2003 ford expedition?

I have po401 code that show up what shall I look for to fix this problem

Code P1405

1997 mountaineer 5 liter motor ,how to replace egr valve, find location

Have 1999 Mercury Sable and failed emissions for P0401 code, I replaced the EGR Valve and had the code reset, service engine light came on again Approx 15 miles later. Took it to Auto Zone and they gave...

Code p0401 i replaced egr tested omhs@voltage on all related parts @reset code still comes on ?

2002 Mercury cugar P0401 and P1401

2001 mercury engine code P0401

What does a PO401 means for a 1998 Mercury Sable

Emission inspection report list a code 401 as the problem.where should i start to correct the problem

Not finding what you are looking for?

1997 Mountaineer

What is the function of the DPFE in a 2003 ford expedition?

Related Topics

Ask a Question

Popular Questions

Can i find my original key less door entry code using my VIN numb

Replacing my mercury mountaineer starter

Engine Failsafe Mode came on after cleaning battery cables. Vehicle will start, but won't run. No throttle

NO manual for a 97 mercury mountaineer

2003 FORD EXPEDITION PCV VALVE LOCATION

Check Out the Latest Top Trucks Report!

Top Mercury Experts

ZJ Limited

Ronny Bennett Sr.

Thomas Perkins

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

Manuals & User Guides