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Thread: Golf DSG 7 speed gearbox issue

  1. #1
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    Golf DSG 7 speed gearbox issue

    Hi all,

    We have a 2009 Golf MK6 1.4 GT TSI with a 7 speed DSG gearbox (code LKP).

    We were on the M40 on Sunday doing about 70mph. I noticed on the instrument cluster that the gear number started flashing. Pulled on to the hard shoulder and it was still flashing. Restarted the car, tried to select any gear and it wouldn't move. Had to get recovered home. No major issues with the car before, my wife said sometimes there was a slight whirring noise in 3rd, 5th gear but was intermittent.

    Today, one of my friends with a diagnostic tool came round to check the fault codes. Fault codes came up with:

    P072C Gear 1 Not Selectable
    P072D Gear 2 Not Selectable
    P072A Gear 5 Not Selectable
    P073B Gear 6 Not Selectable
    P072B Gear R Not Selectable

    Also we could smell the clutch burning when trying to engage a gear.

    Car has currently done 120k so I rang VW to see what gearbox work had been carried out.

    2011, 57K new mechatronics unit
    2014, 106K new clutches

    My understanding (correct me i'm wrong)
    - The 7 speed box is a dry-clutch and it doesn't require a service interval
    - The gearbox uses transmission oil (I need to jack up to check if there's a leak)
    - The mechatronics unit is a sealed unit (would a mechatronics problem show a different fault code)

    Any pointers of where to start to diagnose the problem? Does it sound like a gearbox problem or a mechatronics issue?

    Any advice would be much appreciated.
    2009 Golf GT 1.4 TSI CAVD

  2. #2
    Administrator Crasher's Avatar
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    Typical Mechatronics failure burning out the clutch, odd being that it was recently done, it is a seriously crap system. We have a Fabia 2 (same system) in at the moment where the selector unit failed due to a cup of spilt coffee in the centre consul rotting the connections, after two months the new selector unit arrived today.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (28 September 1868 13 April 1956)

  3. #3
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    Quote Originally Posted by Crasher View Post
    Typical Mechatronics failure burning out the clutch, odd being that it was recently done, it is a seriously crap system. We have a Fabia 2 (same system) in at the moment where the selector unit failed due to a cup of spilt coffee in the centre consul rotting the connections, after two months the new selector unit arrived today.
    Thanks Crasher, it's really what I don't really need right now.

    Can the mechatronics unit be removed without removing the gearbox, any special tools required? I have been looking around and its looks like about 850 to get the mechatronics reconditioned.

    My only concern is the whirring noise on the 3rd/5th gear. I need to check the oil amount in the transmission part of the gear box, if it is low could it mean the gearbox is in trouble as well? I'm wondering if I should look for a secondhand box along with a mechatronics unit and then reprogram.

    My dad recently rebuilt the engine due to compression failure so don't really want to scrap the car.
    Last edited by sbhachu; 17-01-20 at 10:49.
    2009 Golf GT 1.4 TSI CAVD

  4. #4
    Administrator Crasher's Avatar
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    You can remove the Mechatronics with the box in and the special tool you need is easy and cheap to buy, just Google T10407

    So far the actual gear side of these boxes has not caused us any trouble. If the clutch pack needs replacing then yes the box has to come out and specialist tools are required but can be bought from around 250 such as the Laser kit, the tools need to be equivalent to T10323, T10356, T10373 and T10376, buying a used box is a minefield as there are so many variations and many are the reason the car was scrapped in the first place.

    Another word of caution, avoid repaired Mechatronics units at all costs, after bad experiences we will only fit a new genuine VAG unit, these are 1517 but the two year parts and labour warranty is worth it.
    "I disapprove of what you say, but I will defend to the death your right to say it"

    Evelyn Beatrice Hall (28 September 1868 13 April 1956)

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