What does a computer code P0420 mean

Tiny
IAN
  • MEMBER
  • 2004 CHRYSLER PACIFICA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 83,000 MILES
I had the check engine light come on and was told that the code came up as p0420. He told me that it is a problem with the catalyic converter and that it would have to be replaced.

could other things cause this error? If I replaced the converter then how much should it cost?

Friday, November 11th, 2011 AT 2:28 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes this is catalytic converter code but it could be something else besides that. Converter costs vary depending on where you are but I would assume in the range of $500. But check for a coolantleak as this cold cause the converter to give that code or one of the O2 sensors not working correctly.
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Friday, November 11th, 2011 AT 3:20 PM

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