Audi A3 2.0 TDI: Cologne Owner's Guide (Weblog StefanAusKoeln)

Translated on 11-10-2026, 3:36.

Hello everyone,
I recently bought a wonderful A3 8P - and now the troubleshooting begins

.
It's the best car I've ever owned in this life, but it's driving me crazy ^_^.
I will be conducting a log run using MWB 003-008-011 and will upload an Autoscan shortly.
The car goes into limp mode at partial throttle (80-95% accelerator pedal) at approximately 3000 RPM. Full throttle/kickdown does not cause any problems and can be used without issue.
We've already checked the VTG (Variable Turbine Geometry), inspected the hoses, and cleaned the throttle body electronics (which were completely covered in oil), but nothing has worked. Yes, even a new engine ("new," with 300,000 km) has been installed, but the problem is always the same: the engine goes into limp mode, and error code 16118 (16618/P0234/000564 - Boost Pressure Regulation: Limit Exceeded (Overboost Condition)) is logged. After restarting the engine, it runs normally again.

I am very grateful for any advice you can offer.
If anyone from the Cologne area is interested in taking on this task, I would be very grateful and happy to acknowledge their help.

Best regards,
Stefan.