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06 passat engine light

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  • 05-05-2015 6:20pm
    #1
    iano.p
    Closed Accounts Posts: 817 ✭✭✭


    All right folks. My engine light came on today with a message saying "garage emission" I have a cheap obd reader and the code is p0401. Does anyone know if this is an egr valve. I rang around a few places for the part but the price between them all is mad. Any help with be great thanks.


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    #2
    Chris500ie
    Registered Users Posts: 6 ✭Chris500ie


    The OBDII fault code P0401 means that the engine computer has detected that the Exhaust Gas Recirculation (EGR) system flow is insufficient. Read more how the EGR system works below.
    What could cause the code P0401

    - clogged or restricted EGR passages
    - faulty EGR valve
    - EGR valve stuck closed
    - problems with the DPFE sensor (Ford)
    - problems with hoses to the DPFE sensor (Ford)
    - problem with the EGR vacuum switching valve (Toyota)
    - clogged catalytic converter
    - carboned up EGR temperature sensor
    - vacuum supply issues at the vacuum-operated EGR valve
    - electrical problems with the EGR valve control circuit
    - engine computer problems


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    #3
    George Dalton
    Registered Users Posts: 5,728 ✭✭✭George Dalton


    If it's a 1.9TDI then is most likely needs a replacement EGR valve. The rubber diaphragm inside them splits and they cannot open. Hence the insufficient flow error code.

    The part itself is approx €110 ex VAT from VW.


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    #4
    iano.p
    Closed Accounts Posts: 817 ✭✭✭iano.p


    George Dalton wrote:
    If it's a 1.9TDI then is most likely needs a replacement EGR valve. The rubber diaphragm inside them splits and they cannot open. Hence the insufficient flow error code.

    George Dalton wrote:
    The part itself is approx €110 ex VAT from VW.

    George thank you I am getting quote for the part alone 249 here in carlow. Do you know any place near carlow or stradbally that I could get it fitted if that's what's gone on it.


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    #5
    bbability
    Closed Accounts Posts: 2,504 ✭✭✭bbability


    iano.p wrote: »
    George thank you I am getting quote for the part alone 249 here in carlow. Do you know any place near carlow or stradbally that I could get it fitted if that's what's gone on it.

    I've ordered one from MisterAuto.ie for €77. Its easy to fit. A 5mm allen key, four bolts. Pop off throttle body and the EGR Valve sits behind it. Un-bolt EGR Valve and replace with new one.

    http://www.mister-auto.ie/en/egr-valve/volkswagen-passat-3c2-1-9-tdi-105hp_v18522_g1145.html?search_toolbar_query=egr valve

    I'm replacing mine on Friday. Have the same issue and fault code. I took it off and cleaned but as posted above diaphragm is busted.


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    #6
    iano.p
    Closed Accounts Posts: 817 ✭✭✭iano.p


    bbability wrote:
    I've ordered one from MisterAuto.ie for €77. Its easy to fit. A 5mm allen key, four bolts. Pop off throttle body and the EGR Valve sits behind it. Un-bolt EGR Valve and replace with new one.

    That sounds pretty easy. Could I damage anything on the throttle body taking that off.
    bbability wrote:
    I'm replacing mine on Friday. Have the same issue and fault code. I took it off and cleaned but as posted above diaphragm is busted.

    Would you be able to take pictures when you are doing it. I would appreciate it if you could. Thanks for your help


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    #7
    bbability
    Closed Accounts Posts: 2,504 ✭✭✭bbability


    iano.p wrote: »
    That sounds pretty easy. Could I damage anything on the throttle body taking that off.

    No the only thing is to be careful taking off the screws not to drop one.

    iano.p wrote: »
    Would you be able to take pictures when you are doing it. I would appreciate it if you could. Thanks for your help

    Of course. No problem.


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    #8
    canhefixit
    Registered Users Posts: 636 ✭✭✭canhefixit


    George Dalton wrote: »
    If it's a 1.9TDI then is most likely needs a replacement EGR valve. The rubber diaphragm inside them splits and they cannot open. Hence the insufficient flow error code.

    The part itself is approx €110 ex VAT from VW.

    If you blanked it off and reset ecu would that work George?


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    #9
    George Dalton
    Registered Users Posts: 5,728 ✭✭✭George Dalton


    canhefixit wrote: »
    If you blanked it off and reset ecu would that work George?

    No. It is effectively blanked off as it is because it cannot open.

    The ECU detects no change in the air flow entering the engine when it tries to open the valve, therefore it turns on the MIL and logs the code for insufficient flow.

    The same code would be logged if you blanked off a fully functioning valve.


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    #10
    iano.p
    Closed Accounts Posts: 817 ✭✭✭iano.p


    bbability wrote:
    Of course. No problem.

    Thanks bbability I have some time of next week so ordered the part. With your pictures will help no end.


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    #11
    iano.p
    Closed Accounts Posts: 817 ✭✭✭iano.p


    Just wondering bbability did you change yours yet. Did you snap any pictures of the broken egr.


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    #12
    bbability
    Closed Accounts Posts: 2,504 ✭✭✭bbability


    I only got the part yesterday so I hope to do it today or tomorrow.


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    #13
    iano.p
    Closed Accounts Posts: 817 ✭✭✭iano.p


    bbability wrote:
    I only got the part yesterday so I hope to do it today or tomorrow.


    Thanks mine is due tomorrow so hopefully can do it then.


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