Mitsubishi Mirage This sport compact offers economy without compromising comfort.

OBD II Code P0420 1997 1.8 Mirage LS 145,00 miles

  #1  
Old 08-27-2014, 04:24 PM
Junior Member
Thread Starter
Join Date: Nov 2013
Posts: 8
Default OBD II Code P0420 1997 1.8 Mirage LS 145,00 miles

Been having intermittant Check Engine light problems. Found out today that it is a Catalyst System Efficiency below Threshold. From what tech said it needs a new catalytic converter. Is this something you can do yourself. Also any ideas on cost. He said universal with welding would $80 plus os oem would be upwards of $400. Any thoughts and recommendations. Runs good except on real fast acceleration...guessing that is caused by cat converter being clogged. Thanks for any and all help.
 
  #2  
Old 09-09-2014, 01:56 PM
Junior Member
Join Date: Aug 2013
Posts: 5
Default

This is a very common code. I am myself experiencing the same check engine light. There are a number of alternative fixes you can try before spending the big bucks.

P0420 Mitsubishi Catalyst System Efficiency Below Threshold Bank 1 OBDII Engine Light Trouble Code | Engine-Codes.com

Changing O2 sensors is another possible cheaper alternative, and has resolved the issue from some people. I would hate to spend that much money and all it needed was a new O2 sensor.

For me the light is not permanently on and everything I've read says this is a code you ignore until you do see performance loss.
 
  #3  
Old 09-11-2014, 06:52 AM
Junior Member
Thread Starter
Join Date: Nov 2013
Posts: 8
Default

Thanks BCloud for the info. What I've done is to clear code by disconnecting battery cable. I have driven it about a week(300 miles) and have not noticed anything. Today I will check my gas mileage to see what it is now.
 
  #4  
Old 09-11-2014, 01:18 PM
Senior Member
Join Date: Jun 2013
Location: Northland, NZL
Posts: 1,219
Default

Originally Posted by jssjr5591 View Post
Is this something you can do yourself. Also any ideas on cost. He said universal with welding
can you positionally weld thinwall pipe?
Yes? You can diy.
No? You cant.

Issues under heavy load can stem from any number of things.
Try the cheap options first.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
TheRock0720
2nd Generation
2
01-05-2012 12:30 PM
fords77
Intake, Headers and Exhaust
0
05-22-2011 11:19 AM
bagaak
2nd Generation
4
02-16-2008 07:36 PM
Stryker
2nd Generation
9
09-16-2007 08:36 PM
Britvalencia01
2nd Generation
0
05-13-2006 11:18 PM


Thread Tools
Search this Thread
Quick Reply: OBD II Code P0420 1997 1.8 Mirage LS 145,00 miles


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 Amazon.com and affiliated sites.