PO420 catalyst system

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PO420 catalyst system

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Volkswagen Forum >> VW MODELS >> Volkswagen Jetta >> PO420 catalyst system

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PO420 catalyst system - 9/11/2007 10:01:41 AM

sacana

Posts: 1
Joined: 9/11/2007
Status: offline

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.

Thank you,

L.U.