P0172 Audi - how to fix

Question

new air filter, cleaned MAF, replaced vacuum hoses. Still getting code...

Answer 1

P0172 Fuel trim too rich

Vacuum leaks can set fuel trim rich code, the 2.7 is a turbo engine, the turbo inlet tube can also set this code

 On this Audi a fuel trim rich code condition occured, which Audi uses a P1125 and P1123, For system too rich. What was found was the suction pump.

Here is the suction to check if it is plugged,remove both hose blow through the side port if air does not exhaust throuh the suction is plugged