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  1. #1
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    P2100 Fault on 2.5 Tdi B6 A4 convertible

    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.

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  3. #2
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    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?

  4. #3
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    The plastic gubbins inside the throttle body are damaged hence the flap not operating correctly, they are about £300 from local audi dealer...
    FOR SALE:
    -Golf mk 5/audi a3 1.6 FSI fuel pump, brand new genuine part boxed + seals
    -audi a3 (1998 to 2003) genuine clutch slave cylinder to fit 1.6 engines BRAND NEW
    -Rear bush press tool to fit new rear axle bushes on Golf Mk3/4, Audi a3/S3, Seat Leon/Toledo, Skoda Octavia mk 1/2 used once

  5. #4
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    Thank you Adam! I will buy a new throttle body and give it a go...

 

 

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