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Model specific boards => Golf mk5 => Golf mk5 how to guides + info => Topic started by: RTechUK on 02 March 2011, 14:37

Title: Golf Mk5 1.9 2.0 TDI 17965 fault code / VNT Vanes Clean & Repair
Post by: RTechUK on 02 March 2011, 14:37

R-Tech VNT sticky turbo vanes repair   http://uk-mkivs.net/forums/t/393599.aspx

In 90% of cases this will stop overboost limp mode, return better MPG and make the car more responsive.

PART 1 > http://www.youtube.com/watch?v=jgqDEBEOF_4

PART 2 > http://www.youtube.com/watch?v=UWyN53N_uMI&feature=related

PART 3 > http://www.youtube.com/watch?v=dhZYCUKOVRc&feature=related

PART 4 > http://www.youtube.com/watch?v=43W7Abmwhhk&feature=related

We also blueprint the VNT fittings and shims to allow for more clearance to help stop it happening again.

I have managed to save around 60+ Tdi owners £1200 each after main dealers have told them they need new turbo unit to stop the overboost.  :happy2:   

When a edc16 1.9 2.0 TDI see 400mb overboost condition for more than 10 seconds then main fuel IQ map reverts to a generic setting for limp mode to reduce the engine power output, but becuase the VNT is sticky the turbo will continue to overspool/boost. 
The constant overspool/ boosdepend on vanes position, but both conditions cause heat build up and can warp / melt the turbine tiops and vanes.  This happend more so on cars running stock mapping and can happen with less than 50k on the clock.


Pics of a VW Touran 2.0TDI 55k stock mapping which had the 17965 fault for 6month, this one we could not fix due to the melted parts..lol

(http://i653.photobucket.com/albums/uu260/r-tech-rr-graphs/IMG_0582.jpg)
(http://i653.photobucket.com/albums/uu260/r-tech-rr-graphs/IMG_0548.jpg)
(http://i653.photobucket.com/albums/uu260/r-tech-rr-graphs/IMG_0552.jpg)
(http://i653.photobucket.com/albums/uu260/r-tech-rr-graphs/IMG_0586.jpg)

I hope by posting this it saves someone splashing out £1200, when a basic £235 strip down and clean will fix the over boost in 90% of common 17965 faults.

Nick Gower
R-Tech 01455 617233

Title: Re: Golf Mk5 1.9 2.0 TDI 17965 fault code / VNT Vanes Clean & Repair
Post by: RTechUK on 19 May 2011, 12:22

Can this be made a sticky..sorry the pun   :rolleyes:

Title: Re: Golf Mk5 1.9 2.0 TDI 17965 fault code / VNT Vanes Clean & Repair
Post by: RTechUK on 26 July 2011, 10:53

26th July 2011 Job number 1
Stock mapped 2005 Audi A3 2.0TDI 140pd with 88k which has had sticky VNT for 3 months and only went into limp mode 5 times.
End result was melted turbine wheel tips and melted VNT vanes which has resulted in the turbo being a door stop.


Pictures below show the results of the:
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-10 - - - Intermittent


(http://i258.photobucket.com/albums/hh252/Rtechremaps/IMG_1471.jpg)
(http://i258.photobucket.com/albums/hh252/Rtechremaps/IMG_1472.jpg)
(http://i258.photobucket.com/albums/hh252/Rtechremaps/IMG_1469.jpg)