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Exhaust gas recirculation issue?

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December 10, 20214 yr

Hi,

I wonder if anyone could advise me regarding the attached video?

I'm extremely new here and would like some advice. My Audi A6 2.7TDi has developed a loud ticking on and off during idle, the video shows two items simultaneously activating on and off continuously. I think these are the control unit for the turbo, and the other perhaps related to the exhaust gas recirculation sensor?

This noise / action continues for a short time after the ignition is turned off.

If anyone has any ideas on what is possibly causing this, I would be grateful for your input.

December 10, 20214 yr

Welcome to the forum you'll find the members on here are a friendly and helpful bunch ☺️

I'd definitely recommend a diagnostic check. But a common issue on this engine is with swirl flaps:

https://www.audi-sport.net/xf/threads/audi-a6-v6-tdi-and-other-vag-models-swirl-flap-arm-and-butterfly-repair-kits.209136/

And here's info on c6 maintenance:

https://www.audiworld.com/how-tos/a/audi-a6-c6-general-information-and-recommended-maintenance-schedule-423859

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Exhaust gas recirculation issue?

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Are S5's notorious for not being serviced?

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