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I had a garge check the codes when the check.

Tiny
ANONYMOUS
  • MEMBER
  • 2003 VOLKSWAGEN JETTA
  • 60,000 MILES
I had a garge check the codes when the check engine light came on and they found P0420, catylst efficiency low, bank 1. What does this mean?
Monday, November 12th, 2012 AT 11:29 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
99% of the time it means you need a new Catalytic Converter on Bank 1 which may be the only one.
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Monday, November 12th, 2012 AT 11:38 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,742 POSTS
There's no change in the composition of the exhaust gases taking place in the catalytic converter. Time for a new one.
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Monday, November 12th, 2012 AT 11:39 PM
Tiny
EXOVCDS
  • MECHANIC
  • 1,883 POSTS
2.0L engine? Burning oil? City driven only?

Thomas
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Tuesday, November 13th, 2012 AT 12:09 AM

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