PO420 catalyst system
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Joined: Sep 2007
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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.
Thank you,
L.U.
Thank you,
L.U.
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