VW T5 multivan 2.5 tdi 174 - turning off the turbo while driving

Hello ... I have been struggling with the turbine problem for some time .... vw 2.5 tdi 174 engine ...
While driving, exactly around 105-110 km / h, the turbine switches off and goes into emergency mode. Of course, when we turn off the engine and restart it, the problem disappears and we can go on. The problem does not always appear and you can travel 50 or 300 km. and you can drive 100 and 140 but the speed limit is 105-110 km / h.
It should be noted that last year the turbine was regenerated and earlier the water pump was replaced, which gave the effect of disappearing fluid in the cooling system.
At the mechanic - it was found that the turbine is mechanically OK. so the reason lies elsewhere but where ....? Are these regenerations sometimes pic photo montage ???? although it must be noted that the engine has power and there is nothing to complain about, everything is ok up to the speed limits and it is not known how many kilometers .....
it happens that the turbo turns off after 50 km. after driving or maybe after 250 -300 or 100. but it is so annoying that you never know what and how it will happen and especially when overtaking ...

did anyone have such a case?

when replacing the water pump, these were the adventures: https://www.elektroda.pl/rtvforum/topic2395987.html

To start with, check all the negative pressure that controls the turbine, most likely a rubber hose has worn or broke and left air gets in. But take the diagnostics should be an error from the boost pressure.

Moderated By T5:

3.1.11. Do not send messages that add nothing to the discussion. They are misleading, dangerous or do not solve the user's problem.

There is no legend that indicates that left air gets under vacuum, like ??? please do not write such nonsense and do not mislead people.

As for this fault, it is a fault probably known to everyone, the turbine in this case has nothing to do, the mechanic who replaced the turbine and regenerated it forgot that cleaning and bringing the turbine as new would not give the following results.

Go, buddy, to the right mechanical plant and let you check your vacuum pressure during the vacations, if the pressure is adequate and there will be no decrease in time to deal with the geometry of the turbine, it turns off depends on the load and intake of exhaust gases. nothing can bury everything and clean.

As it goes into safe mode there can be many reasons. Solenoid valve, pear, vacuum leak, flow meter, etc. ... Reading errors first and then you can think again

And today I made one more small test .... like a 2.5 174 engine .... and at 50 km / h I drive 6 and a pedal into the floor ..... The car should reach 2 thousand revolutions and here almost faint response ... there was a reduction for 5 and pedal and we also do not embrace any revelations .....

Do not carry out tests, lift the mask and see the vacuum hoses.

Hello, I have the same problem
You may have solved your cause

Still the same .... they suggested that the turbo should be replaced with a new one from the site .... at what speeds it turns off? At your place Did you exchange a turbo? Regenerowaleś?

Turbo twice checked on the dynamometer like everything is ok and for me at about 110 km it loses power and just turn off the engine and after firing again ok. Mechanic claims that the injectors to be replaced

This fake car is not read properly by any fake.

Dizba if you could develop a little hint. Thank you in advance

I have such a car and several computers. When the trouble started, mine read nothing. I visited several friends, the same. It wasn't until I bought the original VCDS that the problem ended. And that was a few years ago.

I have the same problem, Highway 140 and suddenly no power. Exit to the car park off / on and everything returns to normal. Share how did you solve this problem?

You have the answer above.

Should I buy VCDS?

After all, you can drive to a decent diagnostic workshop. But again, it must be the original.

I also had such a problem that the lack of power and the engine fell into emergency mode and drove like sdi. At the beginning I replaced the pear because it cuts. Later it turned out that the geometry also intersects. Was expelled like new. And finally I had to visit a guy who regenerates the turbo and set a pear for me because someone in front of me turned the bumper on the turbine and was overloading the engine.

Topic solved .... So, after checking the regeneration of the turbine that was installed in the engine, it turned out that regeneration is OK. So says the company that carried out the regeneration. I say NO ... Because after buying a new turbine .. cost 2100 PLN + replacement engine works much better does not fall into the so-called emergency mode, i.e. when the turbine does not rain ...... CONCLUSION FOR ALL OF THOSE .... WE UNUSH BUY A NEW TURBINE AND FORGET ABOUT THE SUBJECT .... all those companies with whom I had to deal with regeneration you can know where to put ... .. REGARDS ...

LINK TO NEW TURBINE ..
https://allegro.pl/oferta/turbina-vw-multivan-t5-transporter-2-5-tdi-nowa-7859385471

I will not agree with a friend that you need to exchange the turbo. Nothing happens with me after my last adventure in November. I did nothing and the car drives without a problem.

Hello, I have such a problem. Only in the summer there are no symptoms at all, as it is outside. It drops to about 10 degrees and less, it happens to me that it disconnects the turbo and goes into emergency mode and after restart it is good once more often, less often and in the summer in general. The error that only the 2.0 140km 2013 Caravella engine did not reach some pressure