Question about 2000 Ford Focus

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Ford focus with p0401

Have a ford focus 2002 with the code p0401 code wondering if that was the dpfe i think thats the aberivetaion i saw looking around this site

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  • Anonymous Mar 19, 2014

    p0401 code was detected



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PO401 is EGR flow insufficent. Replace the EGR valve.

Posted on Feb 11, 2009


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I cant get rid of p1401 code on 2001 focus already replaced dpfe sensor

Are the hoses to the dpfe clear & not a problem?

Is the egr valve working?

May need to look at scan tool data, for not only
the codes, but voltages from the sensor

Check wire connector pins?

Oct 20, 2014 | 2001 Ford Focus

3 Answers

What is this code p1401

it's call DPFE Sensor Differential Pressure Feedback EGR is located on top of engine square looking with the electrical connector so replace it with part no. 4U7Z-9J460-AA get it from the dealers parts dept. ok disconnect negative side of the battery after installing sensor put negative back on battery then restart let it run ok.

Jul 01, 2014 | 2000 Ford Focus

1 Answer

Trble code PO401 and PO455 codes light up along with engine light on. one mechanic looked at it and said it needs a DPFE sensor. What is that and where is it? I can do the work if I know where it is. ...

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:
    btn-view-details.png Price: $44.99
    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'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:
    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.

    Oct 26, 2010 | 2001 Ford Focus

    1 Answer

    97 isuzu rodeo, check engine light with po401 code changed egr valve without success, was looking at evap, and now wondering about dpfe sensor, info is good

    DPFE is a reasonable concern. There is also a very thin tube from the EGR to the DPFE that plugs up with carbon. Check the tube prior to the DPFE.

    Feb 24, 2010 | 1999 Isuzu Rodeo

    2 Answers

    Check engine light with code p1401

    Recirculation (EGR) valve codes. The Differential Pressure Feedback EGR (DPFE) sensors on these vehicles have a high failure rate. Ford now uses a redesigned DPFE sensor. In effect, since the failure rate is so high, if you get this code, replace the sensor and retest. When the DPFE Sensor starts failing, it gives the PCM bad information. The DPFE Sensor is less sensitive, and the PCM thinks less recirculated gas is being burned than is actually so. Trying to compensate, the PCM opens up the actuator too much. This excessive amount of EGR combined with the air coming in via the throttle body leans out the fuel mixture, causing a lean misfire, which is the "stumble" or "hesitation" that is common as the DPFE Sensor fails. The DPFE sensor in the Focus is not very robust, requiring frequent (every 30k miles or sometimes less) replacement or a work around. Note that complete DPFE sensor failure is a very slow process, and the check engine light won't come on until the DPFE sensor is pretty much done for. If you're experencing stumble or hesitation while cruising, and think that it might be related to DPFE sensor failure. If the stumble goes away, then your DPFE sensor is more than likely failing. Of course, replacement of the bad DPFE sensor is the official recommended fix for this problem.

    Jul 29, 2009 | 1998 Ford Ranger SuperCab

    1 Answer

    I have a 2001 Ford Focus. The service engine light came on. The diagnosis was I need to repalce the EGR value. Where is it located and can I do this myself. Also how do you determine if it is a SOHC or...

    Not sure what your diagnosis was but usually it is not the valve that goes bad. Its usually the DPFE sensor. Both these parts are easty to replace. The EGR valve looks like a flying saucer on top of the engine with a vacuum line going to it. Its most likely green line. The DPFE isnt far away from it. There are two lines going to it and an electrical connector.

    Jul 15, 2009 | 2001 Ford Focus

    2 Answers

    Got code P1402 sum say it is EGR problem, but that code is P0402 I have check all componets and replaced senser,regarlator,and part right next to regalator. also the code was DPFE senser high voltage any...

    code 1402 EGR valve position sensor open or shorted, check the wires going to the sensor and the plug itself,hope this helps if not get back to me and we'll go from there

    May 15, 2009 | 2001 Ford Escape

    1 Answer

    Trouble code P0402 on a 2001 ford focus 2.0 spi

    Replace the DPFE sensor, this should correct the concern.
    Here is a pic of what it looks like.

    Mar 23, 2009 | 2001 Ford Focus

    2 Answers

    2002 ford focus p0401

    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

    Feb 10, 2009 | 2000 Ford Focus

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