A metallic whistling or grinding sound is heard from the engine compartment when th evehicle is at idle speed
Audi technical service bulletin A171669 2040644- for 2013-2016 Audi A6, 2013-2016 Audi A8 and 2013-2016 Audi A7.
- Bulletin number
- A171669 2040644-
- Component
- Engine
- Summary
- A metallic whistling or grinding sound is heard from the engine compartment when th evehicle is at idle speed. The sound usually occurs when the engine is warm. The MIL is sporadically on due to DTCs being stored in the ECM. A leak in the crankcase breather module can cause this condition.
Owners of these vehicles have filed 134 complaints in the engine category.
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