Differential Pressure Sensor -G505-, REMOVING AND INSTALLING: Notes
WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
The Differential Pressure Sensor -G505- Determines the Particulate Filter Load Level.