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3.0tdi Quattro auto fault code.....

Discussion in 'A6/S6/Allroad forum (C6 Chassis)' started by NotNormal, May 18, 2013.

  1. NotNormal
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    NotNormal Member

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    [​IMG]

    I keep getting this fault code coming up ..... Any help anyone ?


    symptoms are, driving in sport, progressive acceleration, 3rd to 4th and 4th to 5th, top end of the revs it rumbles/judders for a couple of seconds then sometimes drops into the next gear, sometime I have to back off the throttle then reapply to get it to engage the next gear

    I've had the box checked, the oil is of good quality and no water ingress - the oil level is satisfactory too

    trying to get a heads up here.....any help ?
    #1
  2. NotNormal
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    NotNormal Member

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    There are no other fault codes in the car either, nothing in the engine ecu ------ :/

    Ignore the age of the fault, this is an old picture i took - the fult has happen 5 or 6 times today on a run back from Blyton
    Last edited: May 18, 2013
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  3. gen.heinz guderian
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    gen.heinz guderian Well-Known Member Regional Rep

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    its the gearbox ECU check the wiring /plugs as well.
    #3
  4. NotNormal
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    NotNormal Member

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    any hints on locations for the g/box ecu ?


    thanks


    tom
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  5. Ste_Nova
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    Ste_Nova Active Member

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    under the floor?
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  6. gupsterg
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    gupsterg Active Member

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    It is in the transmission ... only accessible with the sump of gearbox removed ...

    You can access elec.harness on outside of gearbox ...
    #6
  7. NotNormal
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    NotNormal Member

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    Turns out it was an issue related to the fuel system

    Every two seconds after the low fuels pressure code flashed up the gearbox fault was logged
    Then the low fuel pressure fault vanished from the ecu

    The cars had a complete fuel system bar the tank and on fuel pipe as per a TPI from Audi - I've done 1000 + miles and its faultless
    the cars slightly better on fuel and the performance is back
    #7
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  8. gupsterg
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    gupsterg Active Member

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    Thanks for update ... happy [​IMG]...
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