Passat 3C: Boost Pressure Too Low - Troubleshooting

Hello,

I need some help with this error. I've attached the Autoscan.

Can we already see from here what it might be caused by?

Greetings.

Hi,

VTG adjustment lever not retracting properly.
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or

Turbocharger air intake system leak:
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Best regards, Rainer.

Thank you. I've checked it, but unfortunately, I couldn't find anything. I've noticed that the error only occurs when I drive with the cruise control for a while, or when I keep my foot on the accelerator for an extended period.

I've also noticed that it makes a rattling noise at low RPMs when accelerating.

Hello,

Quote:

I've noticed that the error only occurs when I drive with the cruise control engaged for a while, or when I keep my foot on the accelerator for an extended period.

It's possible that your VTG (variable transmission gear) is simply stiff.
You can apply a small amount of copper-based assembly paste where the VTG lever connects to the loader, just in case the adjustment shaft gets stuck (which is unlikely but possible).

If the VTG (Variable Turbine Geometry) adjustment mechanism is stuck internally, the only solution is to disassemble it or replace the turbocharger altogether.

Best regards, Rainer.