My Mazda Millenia 2000, check engine light came on, i checked at the nearest advanced Auto shop and got the following code: P0420 , Catalyst System Efficiency below Threshold bank 1. Can someone help

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Asked by Sep 04, 2015 at 12:28 PM

Question type: Maintenance & Repair

1 Answer

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Here you go this should help...http://engine-codes.com/p0420_mazda.html

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