General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here...

P0420 Code

Old 07-01-2006, 12:11 PM
Junior Member
Thread Starter
Join Date: Jul 2006
Location: United States
Posts: 2

I have a 2000 Mercury Mystique 6cyl. About a two months ago I had the P0420 Code come up, went and had the Cat changed on it. About two weeks later the same code came up. Turned the check engine light off with the OBD2 scanner.And cleaned the wires going to the 02 sensors. And now yesterday 6/30/06 the check engine light came back on with the same code. I notice when the MIL comes on the gas mileage drops down. I mean way down, I get about 100 miles to a TANK when it comes on. Anyone have an idea of what is going on. The car has 118k on it. It runs great, will get up and go with the best of them. Thanks for all your help!
Related Topics
Thread Starter
Last Post
Grand Marquis
04-25-2013 04:17 PM
11-29-2010 06:36 PM
07-04-2006 05:53 PM

Thread Tools
Search this Thread
Quick Reply: P0420 Code

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.