Touran with engine code AVQ has lost power

Hello everyone.
I'm having a problem with a friend's Touran, specifically the 74KW/AVQ model.
The Touran suddenly lost power over the weekend.
After reading and clearing the errors from the past few years, the following error remains:

Control unit part number: 03G 906 016 BT HW: 028 101 073 1
Component and/or version: R4 1.9L EDC G000SG 7210
Encoding: 0000072
Operating number: WSC 68331 126 01118
VCID: 76E8693901DC1C3
16683 - Charge pressure control.
P0299 - 000 - Regulation limit exceeded (low).
Environmental conditions:
Speed: 2856 RPM
Torque: 208.0 Nm
Speed: 61.0 km/h
Last: 73.7%
Voltage: 14.29 V
Binary value: 00001000
Pressure: 2029.8 mbar.
Pressure: 1275.0 mbar

The vehicle has 217,000 kilometers on the odometer, and a VCDS diagnostic tool is included.

Does anyone have a tip on how to best track down the source of the error?

Regards,
Sure, here is the translation of the text from German to English:

"Dirk"

Suddenly, to me, it always sounds like a torn or detached charge air hose.
or, alternatively, due to a general leak in the LL system.
Best regards,

Hello,

I've roughly checked the hoses before, and vacuum does reach the VTG sensor, but some hoses disappear quickly into the engine compartment, so it could also be a leak somewhere.
At first glance, at least, I didn't notice anything like that.

Regards,
Sure, here is the translation of the text from German to English:

"Dirk"

HI,

This issue has just given me an idea.

- find a steep mountain - a really steep one.
- Parking brake engaged.
- attempt to approach
- try to approach
- try to get closer to

Specifically, the 1.9-liter engines with their small turbochargers should be able to generate good boost pressure. *)
And that, while STANDING .
A second. A person standing next to (or even in front of) the vehicle can then listen to where the unpleasant hissing sound is coming from.

My ex-1Z was driven with a completely detached intercooler hose... he only left two nasty black marks on the asphalt .

m;

*) I'll check that with the BLS later - a mountain is present .

Quote:

The vacuum also reaches the VTG sensor, but some hoses quickly disappear into the "void," so it could also be a leak.

Are hissing sounds audible during acceleration?

Is the VTG (Variable Torque Generator) functioning correctly, and does it extend fully even when the engine is idling?

Are there any signs of martens?

Autoservice wrote:

Quote: The vacuum also reaches the VTG sensor, but some hoses quickly disappear into the "void," so it could also be a leak. Are hissing sounds audible during acceleration? Is the VTG (Variable Torque Generator) functioning correctly, and does it extend fully even when the engine is idling? Are there any signs of martens?

The hissing sounds are not audible (neither during acceleration while driving, nor when idling with your head in the engine compartment).

I haven't checked the VTG yet. I think what I'm seeing in the upper left corner at the back of the engine is the VTG unit (but I'm not 100% sure about that). "When I disconnect the vacuum hose, I have a vacuum reading there when accelerating while the engine is idling."
I haven't done anything with the VTG pole, which I probably can only feel and not see... You don't want to break anything...
Can I move it (or, to put it another way, am I required to move it) with the engine turned off?

There are no signs of martens.

Here's some additional information to supplement what's already been said. The vehicle is quite "messy" and hasn't been inside a workshop for at least 5 years (except for oil changes).
The release bearing is completely worn out (making noises when idling), the auxiliary heater pump is making noises, and there's a humming/beeping sound coming from somewhere in the rear left area, between the engine and the firewall, when the ignition is on (even with the engine off).

However, all of this has been happening for the last 5,000 km (except perhaps the beeping), and the Touran still had power then. That's why I didn't mention it specifically at first.

The car had only two female previous owners until the specified mileage, and as long as it was "somewhat operational," it never saw a mechanic.

Unfortunately, it doesn't really work anymore.

Regards,
Sure, here is the translation of the text from German to English:

"Dirk"

Check this out: /viewtopic.php?t=24758

and here: /viewtopic.php?t=24759

Okay, I understand. Please provide the German text you want me to translate into English. I will only provide the translation.

The VTG (Variable Turbine Geometry) must already be adjusted to its maximum position in idle.

Okay, I'd like to briefly summarize what came out of this "case."

The VTG adjustment mechanism was stuck/defective. The control rod could not be moved at all. It seems something broke in the turbo.

My colleague, however, didn't want to invest in any major repairs and ultimately sold the Touran.

Regards,
Sure, here is the translation of the text from German to English:

"Dirk"

Thank you for your feedback!

Quote:

My colleague, however, didn't want to invest in any major repairs anymore, and ultimately sold the Touran.

The possible cause ranges from a small stone in the vacuum chamber to bent guide vanes... if that was the only problem, then it's relatively manageable.