A metallic whistling or grinding sound is heard from the engine compartment when the vehicle is at idle speed
Audi technical service bulletin A171670 2040644- for 2013-2016 Audi A6, 2013-2016 Audi A8 and 2013-2016 Audi A7.
- Bulletin number
- A171670 2040644-
- Component
- Engine and engine cooling: exhaust system: emission control: crankcase (PCV)
- Summary
- A metallic whistling or grinding sound is heard from the engine compartment when the vehicle 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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