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Check engine light error code P0420 - 35 - 00 - - Need help!!!

(2003 Volkswagen Jetta)
in Portsmouth, NH on April 25, 2010
I am getting the following error code when I analyze my check engine light:

16804 - Catalyst System: Bank 1: Efficiency Below Threshold

P0420 - 35-00 - -

I checked some VW forums and it seems to be a catalytic converter issue. Something to do with the O2 sensors in the front and back. Could anyone give me an idea on what needs to be done and how much it would cost before I take it to a mechanic? I appreciate your response
Displaying 2 answers & 0 comments
Popular Answer
on April 25, 2010
Be sure to check out this article on the P0420 code first:
on September 30, 2010
po420 code on my 2004 audi a4
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