» » »

Volkswagen Q&A

Ask Your Question

2003 Volkswagen Jetta Question: Check engine light error code P0420 - 35 - 00 - - Need help!!!



Visitor, 4 Cylinder, Portsmouth, NH, April 25, 2010, 10:33

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

2 Answers
Flag This
  • Answer #1

    April 26, 2010, 00:44

    Be sure to check out this article on the P0420 code first: http://repairpal.com/OBD-II-Code-P0420

    Flag This
  • Answer #2

    September 30, 2010, 15:53

    po420 code on my 2004 audi a4

    Flag This