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P2100 Fault on 2.5 Tdi B6 A4 convertible

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by tibyy17, Jul 17, 2012.

  1. tibyy17
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    tibyy17 New Member

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    [Jul 17, 2012]
    Hello guys,

    On Sunday my engine management light came on after started the engine. I checked the fault code: 2100 - "
    Throttle Actuator Control Motor Circuit: Open". I cleared the fault, and its gone. Happy days, till the next cold start when the light came back on. So I decided to remove and clean the throttle body. Its was clean and the flap was moving as it should (I just replaced the throttle body 8 months ago).
    I did check all cables and wires, they are all good and the car drives normal. Any ideas what to do next? All help appreciated.
    #1
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  3. tibyy17
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    tibyy17 New Member

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    [Jul 19, 2012]
    I did some research and apparently on other models its a blown fuse (F8 or 24), lose air hose or lose connector wire or a faulty throttle motor. I was spending my whole afternoon under the bonnet just to look for these things, and checked every fuse in the driver cabin (next to the steering wheel on the side). I got a few questions:

    1: Is there another fuse box in the A4 B6 or just the one I checked?
    2: How can I check if the Throttle Actuator Motor is working?
    3: Anybody have heard of the same fault code on 2.5 Tdi?
    #2
  4. adamss24
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    adamss24 Well-Known Member

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    [Jul 20, 2012]
    The plastic gubbins inside the throttle body are damaged hence the flap not operating correctly, they are about £300 from local audi dealer...
    #3
  5. tibyy17
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    tibyy17 New Member

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    [Jul 20, 2012]
    Thank you Adam! I will buy a new throttle body and give it a go...
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