2014 Audi A8 Quattro Problems

RepairPal has identified the most common problems with the 2014 Audi A8 Quattro as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problem

The 2007-2017 Audi A8 with FSI/TFSI, including the W12, is subject to carbon buildup inside the engine causing power loss, check engine light, and a rough idle. In normal vehicles, the engine is cleaned by the gasoline flowing through, however, these cars use direct injection so gasoline is rerouted away from common carbon buildup areas. 

Possible engine codes include: P0300P0301P0302P0303P0304, P0305, P0306, P0307, P0308, P0309, P0310, P0311, P0312.

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.