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Thread: Code P0401

  1. #1
    Junior Member
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    Apr 2017
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    uk
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    Code P0401

    Hi
    My car appears to get this P0401 code with the engine light on the dash, only happens on very light throttle, EGR valve cleaned out, vaccum pipes in good condition, no other problematic symptoms
    with the car, no limp mode, runs a little lumpy just off tickover, pulls strongly, good mpg. Anybody got any ideas what may cause this ?..Octavia 2.0tdi 16v 2005 1ze BKD

    Thanks

  2. #2
    Junior Member
    Join Date
    Apr 2017
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    uk
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    3
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    ok solved, the diaphram inside the egr valve was leaking, replaced egr valve, all working as should

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