Ecotek PowerBoost - VW Passat TDI Turbo Overboost Limp Mode Problem

I recently had a problem with my VW Passat TDI 140 that was going into limp mode with the error Turbo Overboost problem. It appears that this can be due to the VVT vanes of the turbo getting carbon deposits and sticking. By using the Ecotek PowerBoost product that is sprayed directly into the air intake this is meant to clean the deposits from around the engine components and restore power and economy.

So far the car has been running much more smoothly than before and the turbo overboost limp mode problem has not yet reoccured.