PO420 catalyst system - Volkswagen Forum - VW Forums for Volkwagen enthusiasts

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Old 09-11-2007, 12:01 PM
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Join Date: Sep 2007
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Default PO420 catalyst system

I have a 2002 1.8T jetta and it threw a code saying PO420 catalyst system efficiency bleow threshold bank 1. I would like to know what I need to fix so I can clear the coode. I also wonder if it is my cats are no longer any good or the sensors, but no other code threw.

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18t, 2002, bank, cabriolet, catalyst, code, fix, jetta, po420, system, threshold, volkswagen, volkswagon, volswagon, vw

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