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LIMP MODE

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by hubbo1, Jul 12, 2012.

  1. hubbo1
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    hubbo1 Member

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    [Jul 12, 2012]
    a4 2.0 tdi auto 2005
    while accelerating the car lost power(limp mode?) no warning lights so pulled over ignition off-ignition on and drove fine again.
    there was a fault code-overboost-on diagnostic, any ideas?
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  3. wayne77
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    wayne77 Member

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    [Jul 12, 2012]
    this could be a number of things but i would start with looking for a split vaccum pipe or maybe one has popped off
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  4. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jul 13, 2012]
    Mileage?
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    Administrators Administrator Staff Member Administrator

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    [Jul 13, 2012]
    As stated it could a host of things... Airmass, Leak sticking VVT. At 7 years old and if the Airmas hasn't been done that's were I would start. To see if any of the pipes are leaking have a look and see if there is any oil leaking out of them. Your car has a small amount of oil being blown around all the time and a good sign of an air leak is the oil getting past the joints.

    Best of luck

    A
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