2014 Audi S5 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2014 Audi S5

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2014 Audi S5 Problems

Decreased Power and Fuel Economy from Carbon Buildup

The 2008-2017 Audi S5 uses the 3.0TFSI and 4.2FSI direct injection engines. These 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 S5 uses direct injection so gasoline does not flow through common carbon buildup areas. 

Possible trouble codes include: P0300P0301P0302P0303P0304, P0305, P0306.

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.

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