P0422 Main catalist: bank 1 efficiency below threshold

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01-26-2005, 05:09 PM

A4Quatro

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P0422 Main catalist: bank 1 efficiency below threshold

Hello,
Does anybody know how can i troubleshout the message that I just have read with VAG COM?

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01-26-2005, 05:13 PM

Ritz

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which engine?

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01-26-2005, 05:33 PM

A4Quatro

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Re: which engine?

A4 quattro 2.8 /6 cyl.

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01-26-2005, 06:01 PM

Ritz

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either a bad cat on the passenger side or a bad O2 sensor aft of the cat on that side

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