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Thread: 2011 A5 Sportback 8TA 3.2 FSI - 56 Radio 00821 Error Code

  1. #1
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    2011 A5 Sportback 8TA 3.2 FSI - 56 Radio 00821 Error Code

    Hello,

    I've recently purchased this fantastic car as second-hand and few weeks after ordered an HEX-V2 interface from Ross-tech France where I'm living, as I'm a big car enthousiast guy, fan of mechanics from a long time in particular.

    Even after some searches around the web on Audi oriented forums or here, I can't find the root cause of the following error :

    00821 - Antenna 2 for Radio (R93)
    007 - Short to Ground

    Everythings seems to works fine even If I'm afraid it could occurs some battery drain or disturb the way my MMI 3G High is working. Here is the logs :

    Wednesday,08,January,2020,15:45:29:62635
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 19.6.2.0 (x64) HEX-V2 CB: 0.4513.4
    Data version: 20190930 DS308.0
    www.Ross-Tech.com


    VIN: WAUZZZ8T8AA?HIDDEN? License Plate: BH-HIDDEN



    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------


    Address 56: Radio Labels: Redir Fail!
    Control Module Part Number: 4F0 035 053 K HW: 4F0 035 053
    Component and/or Version: Radio U Basic H45 0074
    Software Coding: 010003010000000001
    Work Shop Code: WSC 06325 000 00000
    VCID: 2517F10045EE4C9F9A1-8070
    1 Fault Found:

    00821 - Antenna 2 for Radio (R93)
    007 - Short to Ground
    Freeze Frame:
    Fault Status: 01100111
    Fault Priority: 5
    Fault Frequency: 1
    Reset counter: 17
    Mileage: 87142 km
    Time Indication: 0
    Date: 2020.01.08
    Time: 15:44:30

    Freeze Frame:
    Voltage: 12.90 V

    Also, I own full Audi workshop manual in order to work on the car, any help really appreciated, to investigate and fix this error.

    Cheers

  2. #2
    Ross-Tech Employee DrPeter's Avatar
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    Hello,

    If your radio is working okay and there is no real loss of FM reception, you could just leave it be.

    But if you wanted to, you can check the connections to the 'R93-Radio Antenna 2' (R111-Areial Amplifier 2).

    Since this Radio uses phase diversity, there are four Antenna Amplifiers, the one you want to check, the R111, is located at the bottom, left of the tailgate. See the Official Factory Repair Information for complete details.



    Hope this helps,

    Peter

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  4. #3
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    Many thanks for your support, based on my local dealer R111 is installed on each side of the tailgate. When I open the boot from the back of the car, based on your answer, I imagine I have to replace the one on the left side of the tailgate that's it?

  5. #4
    Ross-Tech Employee DrPeter's Avatar
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    Quote Originally Posted by jeyjey35 View Post
    Many thanks for your support, based on my local dealer R111 is installed on each side of the tailgate. When I open the boot from the back of the car, based on your answer, I imagine I have to replace the one on the left side of the tailgate that's it?
    Hi, so when you search for the "R93" in the parts catalog, the one on the [Left] side is displayed, order by VIN, because there are 6-7 different ones (based one equipment, etc)!

    So yes, I would have to say that I am reasonably sure the one on the left that has the issue.

    There is a quick simple test to be sure and that is to unplug the one on the right to see if you get a different fault code.

    Have a great weekend,

    Peter

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