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Thread: Code P0401 won't go away

  1. #1
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    Code P0401 won't go away

    The P0401 code on my 99 VX shows to be "EGR Flow Insufficient". Research points to the EGR valve. I took it off and cleaned it real good and re-installed with a new gasket. The code came back. A new one costs $160 so I'm reluctant to buy one unless I'm sure thats the problem. Anyone else run across this?

  2. #2
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    Man - that worked!! You rock!

  3. #3
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    2000, white, ironman, 0699
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    This quick and easy job worked for me too. My check engine light went off soon after and has not returned. I used CRC throttle-body and air intake cleaner. I cleaned the throttle-body while I was at it.

    I bought a new EGR valve when I learned what the code P0401 was, from Amazon. Easy to install. I hadn't seen this thread at the time -- maybe I didn't need a new EGR valve after all, just a good cleaning.

  4. #4
    Member Since
    Jan 2012
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    2001, Ebony Black, VX
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    I am just learning about VXs, but I read a lot about these EGR valves. Can someone on here educate me as to what it looks like and its location in the engine compartment? If you have any pictures of this process of cleaning it, please post those too.

    I did a little research on youtube, but nothing is specific enough to the VXs. It seems location on the engine is different for every vehicle.

    Thanks for teaching :-) Hopefully one day I will put this new found knowledge to work!
    '03 Honda CR-V (DD) - '05 Jeep Wrangler Rubicon - '01 Ebony VX!

    A smile is like tight underwear, it makes your cheeks go up!

  5. #5
    Member Since
    Jun 2004
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    99 Astral Silver VX #1872 + 99 Ironman WIP
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    Wrench

    Quote Originally Posted by jeeperkate View Post
    I am just learning about VXs, but I read a lot about these EGR valves. Can someone on here educate me as to what it looks like and its location in the engine compartment? If you have any pictures of this process of cleaning it, please post those too.

    I did a little research on youtube, but nothing is specific enough to the VXs. It seems location on the engine is different for every vehicle.

    Thanks for teaching :-) Hopefully one day I will put this new found knowledge to work!
    Here ya go Kate...



    It's near the firewall, on the pass side of the engine bay.
    Though this example is on a supercharged engine, the loca is virtually the same on N/A engines.
    Last edited by Ldub : 01/14/2012 at 06:38 PM

  6. #6
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    Thank you!

  7. #7
    Member Since
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    1999, Ebony, VX, #1679
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    Now get out there and take care of that rust Dub!
    Billy Oliver
    15xIronman
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  8. #8
    Member Since
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    Talking

    Quote Originally Posted by Triathlete View Post
    Now get out there and take care of that rust Dub!
    Billy...Billy...Billy...

    That ain't mine Bro, just the 1st pic I found when I searched EGR pic...

    If you would drop your "dub persecution" persona, & LOOK, you'd see that the firewall is what color???.....
    Last edited by Ldub : 01/15/2012 at 09:38 AM

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