Where is the differential pressure sensor located?

Hello,
I would like to know the location of the differential pressure sensor in the Audi Q5 3.0 TDI.
After the engine starts, the yellow glow plug indicator light illuminates.
Okay, here's the translation:

"So, the problem description is: motorization malfunction."
After the diagnostic scan, it was determined that the differential pressure sensor is defective.
I would be very grateful for a hint as to where the "culprit" is located.
Thank you in advance.

Most likely on the injection molding machine, identifiable by one or two rubber hoses connected to it.

Here's what he looks like:
Okay, I'm ready. Please provide the German text you want me to translate.