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Thread: GTD 2015- newbie questions on issues

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  1. GTD 2015- newbie questions on issues 
    #1
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    Hi all

    First time poster; full disclosure I am a self confessed Bimmer geek so don't hold that against me eh?

    Now this is the missus car. Bought it after I had a 63 plate GTD which I loved as a company car. All in good order apart from a niggle I need your advice with- as I am handy with the spanners I am confident to get into stuff myself but also not knowing VAG stuff AND forced induction stuff I would appreciate your views...

    2015 GTD with 125k miles.

    Issue happens when accelerating hard/giving it beans; car goes into limp mode and throws P0299 over/under boost error.

    Also general driving I'd say the car is down on power especially boosting in 3rd and 4th. MPG seems low too.

    Did the usual checked for leaks/obvious hose issues etc, nothing immediate. Took it to my local VAG specialist and his more detailed OBD showed nothing more so he looked for leaks too.

    He suggested as nothing obvious to change the diverter valve which I have done, do difference (other than the error seems to happen more often than it did before??)

    So I am starting to lean towards looking at the turbo actuator to see if thats slow/fouling? Are there any how to guides how to check this?

    What else would you guys suggest I look at?

    Anyone experienced similar?

    Cheers!

    Stuart
     
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  2. Re: GTD 2015- newbie questions on issues 
    #2
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    16683 (P0299) - Boost Pressure Regulation: Control Range Not Reached

    That is underboost. On these engines this is usually a punctured vacuum actuator, apply a vacuum to the port and you should not be able to draw air.
    Anthropogenic climate change, the biggest con inflicted on mankind since religion...

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  3. Re: GTD 2015- newbie questions on issues 
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    When your vehicle goes into under/over boost do you re-cycle the ign on/0ff lets know this
     
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  4. Re: GTD 2015- newbie questions on issues 
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    Cheers for the replies

    I’m leaning toward the actuator being the issue

    Yes I do re cycle the ignition and it resets fine

    I ran vcds after the fault happens and got the following screens
     
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  5. Re: GTD 2015- newbie questions on issues 
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