2004 audi a4 quattro 1.8t diagnostic trouble code p0420
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2004 audi a4 quattro 1.8t diagnostic trouble code p0420
i tried to put my car through emissions in portland, oregon yesterday and the code p0420 came up for catalyst system efficiency below threshold (bank 1). i was wondering if directly replacing the cat converter would be enough to make the error code go away? i found one on ebay for $94...
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Gunter337
Audi A4
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05-06-2013 02:34 AM