2012 Audi A6 FSI and TFSI Engines Carbon Buildup (Intake Valves, Intake, Runner Flaps P0300 series

The 2006-2016 Audi A6 2.0TFSI, 3.0TFSI, 3.2FSI and 4.2FSI direct injection engines are subject to carbon buildup in the intake system which can cause power loss, OBD codes and a check engine light , and a rough idle . In normal engines, the engine is cleaned by the gasoline flowing through the injectors and into the intake system, however, the A6 uses direct injection so gasoline does not flow through common carbon buildup areas.

Possible trouble codes include: P0300 , P0301 , P0302 , P0303 , P0304 , P0305 , P0306 , P0307 , P0308

The solution is to remove the intake manifold and professionally clean the intake manifold, intake ports on the cylinder head, and the intake valves. This may need to be done in as few as 20,000 miles.

Affected Model Years

This issue affects Audi A6 model years 2003, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, .

34 people reported this problem

2012 67,000 Miles

I have taken my car to the dealer 5 times and each time they have sent me away with no remedy. My problem is that I get a ESP fault message with the ECP light and check engine light as well as a TPMS malfunction notification. The car starts shaking and I have to pull over and restart a couple of times. This mostly happens when trying to accelerate onto the highway or to pass a car. I was stranded on the interstate last week after the car show so bad that it stalled out by the time I got to the shoulder. How can the service technicians not know how to fix this. Just spent $ 2000 on a new catalytic converter and an additional $ 200 for cleaning carbon buildup that the dealer shouD have done for no cost. My car now has 74,000 miles and I have to take it back to the dealer for a sixth time.

2012 Audi A6 FSI and TFSI Engines Carbon Buildup (Intake Valves, Intake, Runner Flaps P0300 series

Affected Model Years

34 people reported this problem

Audi A6 2012 Common Problems