Cannot locate the dpfe sensor on my 2002 ford taurus sel 3.0 24 valve dohc engine light on code p0401.

Hi there:
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.
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.


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 helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.


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insufficient egr flow usually the dpfe sensor located in the back of intake manifold or mounted
on firewall.if you follow the wires/vacuum line from the egr valve you'll see it. common problem
& fairly easy job pick up a new 1 so you no what it looks like

good luck

P0401....Exhaust Gas Recirculation Flow Insufficient Detected

best advice with the EGR valve problem is to make a gasket with a coca cola can and sel it off completely

Generic Codes:

P0401 Exhaust Gas Recirculation Flow Insufficient Detected
P0455 Evaporative Emission System Leak Detected (large leak)

Delta Pressure Feedback Electronic (DPFE) system sensor vacuum line

IDuralast/EGR Valve Pressure Sensor
Part Number:
SU2108 Price: $44.99
Warranty:
2 YR Notes: // IE does not support addEventListener var el = document.getElementById("add-to-cart-multibox01"); if (el.addEventListener) { el.addEventListener('click', preventDefaultBehavior, false); } else if (el.attachEvent) { el.attachEvent('onclick', preventDefaultBehavior); } if (typeof(addToCartBoxDefined) == "undefined") { addToCartBoxDefined = true; window.addEvent('domready', function(){ new MultiBox('mb-add-to-cart', {descClassName: 'multiBoxDesc'}); }); } --- When I searched Autozone's site for dpfe I found the above part, but I'm not sure if that's it. I would search for a large vacuum leak somewhere in the hoses, or check the part leading from the EGR to this part for leaks or cracks in the hoses, or the part itself. I didn't find a location for the part on Autozone.com's website. Find the EGR Valve and follow the vacuum lines to the dpfe sensor. Part Number:
EGR2009 Duralast/EGR Vacuum Solenoid For your 2001 Ford Focus 2.0L MFI DOHC 4cyl Part Number:
EVS58 function linkImage(newLink){ var url = newLink.href; if (url.indexOf('prodImageURL') == -1) { newLink.href = url + "&prodImageURL=" + document.getElementById("enlargedImage").value; }else { newLink.href = url.substr(0 , url.indexOf('prodImageURL')) + "prodImageURL=" + document.getElementById("enlargedImage").value; } } function changeImage(filename) { document.getElementById("mainimage").src = filename + '2/'; document.getElementById("enlargedImage").value = filename; } /* */ Price: $29.99 --- Something to do with a large vacuum leak, I think, from a part that connects to the EGR Valve.

is it code P0401? If so the DPFE sensor is bad. It is the sensor to the EGR valve. Very common

you replaced the wrong part. a common problem with this code is the D.P.F.E. SENSOR. ford has revised this sensor due to so much trouble with the old ones. i would get this part from ford so you know you are getting the revised part

Here is a list of possible causes for a PO401, hope this helps.

• DPFE sensor signal circuit is shorted to ground
• DPFE sensor VREF circuit is open between sensor and PCM
• DPFE sensor downstream hose off or plugged
• DPFE sensor hoses both off, loose or damaged
• DPFE sensor hoses connected wrong (reversed)
• EGR orifice tube is damaged or restricted
• PCM has failed

Have it checked again and see what code it is. if it is P0401 it is probably the sensor shown below, The DPFE (Diferential Pressure Sensor)sensor is usually mounted on the engine and is connected to the pipe that runs from the exhaust manifold to the EGR valve with two rubber hoses. When the sensor goes bad, the Check Engine light comes on and typically sets any or all of teh following fault codes: P0171 & P0174 (lean codes), and/or P0401 (insufficient EGR flow). Nine out of ten times, the fault is not a bad EGR valve or a vacuum leak, but a bad DPFE sensor. A replacement costs about $112 at Ford, or about $48 at an aftermarket auto parts store.I hope this helps.

Based on what the tech manuals say I would change the DPFE sensor for the EGR Valve, careful not to tear the special silicone rubber hoses that go to it from the exhaust, as a Ford dealer tech I saw these codes allot, and the DPFE sensor was almost always the issue or the hoses going to it.

You probably pulled a code p0401, insufficient egr flow. Your DPFE sensor is more than likely at fault. There has been a lot of trouble with these sensors. Then reset CEL or disconnect battery for 5 minutes.