2.5 TDI 75kW (AHD) - Turbocharger only engages above 2500 RPM.

And yet another problem.

'Recently, the turbocharger on our LT with the AHD engine has been engaging relatively late.'
Unfortunately, the reason for this cannot be found.

I've checked the usual suspects, such as the mass airflow sensor and the EGR valve.
Okay, so here's the translation:

'Ah, the LMM (mass airflow sensor) is 3-4 months old (a new part from VW), the AGR (exhaust gas recirculation) valve is blocked with a plate, and the vacuum line for the AGR valve's pressure sensor is disconnected (there's a blind plug in the hose).'

I took a short trip with my laptop. By the way, the error memory is clear.
The boost pressure remains at 0.3 bar up to approximately 2300-2400 RPM, and then increases directly to 0.85 - 0.95 bar from that point onwards.
The turbocharger seems to be in excellent condition; without the boost pressure control valve, the boost pressure increases to 1.3 bar.

Where is the error?

Please first enter your VCDS license information in your profile, and then you will find help on what you should check with it.

License data? What's the point of that?
I doubt they'll be able to restore the boost pressure .

Before anyone asks silly questions about the license:
The latest version of VCDS with a cracked interface. The laptop, software, and cables belong to my colleague. Did he ever pay a lot of money for ?

Anyway, none of that changes anything about my problem.
The wastegate is working properly, and everything else seems to be okay.
Possibly, the turbocharger wastegate valve is worn out.

Sure, I'll help you get started.
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Zitat Ende.
Diagnostic support is only available with a valid VCDS license that is registered in your profile.
"The quick brown fox jumps over the lazy dog."

Best regards, Roberto.

Good morning.

Okay, that's good, guys.
I'll try to get my colleague's license information from him this afternoon.
I'm just glad he lent me his netbook, including all the hardware.

However, it would still be helpful if you could give me a hint as to where the error might be. It's not like the car suddenly decided it doesn't want to work anymore.