OBD II Code P0420 1997 1.8 Mirage LS 145,00 miles
#1
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
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.
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
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
Yes? You can diy.
No? You cant.
Issues under heavy load can stem from any number of things.
Try the cheap options first.
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