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2000 AUDI A6 2.8 LITER AUTO. CODE P1171 AND P1568. EPC LIGHT IS ON PLEASE ADVISE

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  • edward lai Nov 05, 2010

    do i need to replace the throttle body assembly or the throttle position sensor

  • edward lai Nov 06, 2010

    i've replaced the throttle assembly (used) the code does not seem to come back but the epc lights still comes back on

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P1171
Throttle Actuation Potentiometer Signal 2 Range/Performance
P1568 Definition: Idle Speed Control Throttle Position mechanical Malfunction
These two codes are related to the same failed part and the very likely cause of this is a defective engine throttle body assembly, this is at the air intake to the engine where the throttle valve is, it is held on by 4 bolts and easy to replace, this is a common failure in this model.

Posted on Nov 05, 2010

  • yadayada
    yadayada Nov 05, 2010

    Yes the throttle body assembly needs to be replaced to correct these two codes. I would suggest you try and find a used one if possible the part is very expensive

  • yadayada
    yadayada Nov 06, 2010

    You must complete I believe 3 drive cycles, if the PCM doesn't sense any further problems then the light will go out, you can also turn the light off with a scanner.

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