A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004

Engine Code Question

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Jul 23, 2007 | 06:33 AM

#1

goldsrr

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Engine Code Question

I have an Engine Code on my 2001 A6 4.2 that reads code# 492--Secondary Air Injection System Insufficient Flow (Bank 2). Does anyone know what this is, whats its impact and where on the engine I would go to correct it? Any info would be greatly appreciated.

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Jul 23, 2007 | 06:55 AM

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MP4.2+6.0

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Start w/ the full normal vacuum line changeout. Per archives.

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