2009 Lancer Gts Catalytic Converter P0420 Code - Mitsubishi-Forums.com
 
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post #1 of 7 (permalink) Old 03-22-2016, 12:03 AM Thread Starter
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Hi,

So I got a P0420 code indicating my Catalytic Converter is bad. I have about 112,000 miles on my car. I have searched for a while and was not able to find a direct fit Catalytic Converter for it. All I was able to find were for the DS, ES and the Ralliart.
Therefore, I am just wondering if anyone on here had experience with replacing their cat converter on this model? I kind of prefer the direct fit so I don't have to have my pipe cut or welded.
Anything would help greatly.

Thanks
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post #2 of 7 (permalink) Old 03-22-2016, 05:18 PM
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have you tried running a gallon of laquer thinner to one tank of gas yet? ive seen people do that and were able to clear away the p0420 code

Derek
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post #3 of 7 (permalink) Old 03-22-2016, 07:26 PM
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Check this first

http://www.obd-codes.com/p0420

It doesnīt have to be a bad converter.

Check other things first before you invest money.
A clogged converter might happen due to lotīs of short range driving (a.k.a. not getting hot)
wrong fuel and oil being burnt due to worn out gaskets - so make sure itīs none of those.
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post #4 of 7 (permalink) Old 02-18-2017, 01:11 AM
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P0420 code

Quote:
Originally Posted by meteora168 View Post
Hi,

So I got a P0420 code indicating my Catalytic Converter is bad. I have about 112,000 miles on my car. I have searched for a while and was not able to find a direct fit Catalytic Converter for it. All I was able to find were for the DS, ES and the Ralliart.
Therefore, I am just wondering if anyone on here had experience with replacing their cat converter on this model? I kind of prefer the direct fit so I don't have to have my pipe cut or welded.
Anything would help greatly.

Thanks
Should be covered under emissions warranty. See your dealer. (mitsubishi dealer!)
10 years 160k
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post #5 of 7 (permalink) Old 02-21-2017, 12:06 PM
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112,000 miles is well beyond the 160,000km warranty and is actually around 180,000km.

The extend on Xrx's comment, if you mainly do low speed stop and go city traffic, go for a cruise on the highway and let the system fully heat up.


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post #6 of 7 (permalink) Old 03-07-2017, 08:10 AM
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I have the same code and had it for a long time. I replace my catalytic converter last week anlong with the O2 sensor. You do need to weld the converter and whats nice is the converter end can just slip over the factory exhaust pipe and weld it in place. However, just this past Saturday the code came back on. I dont know what now. I replace the upstream sensor when I first ran into this code and replace the downstream sensor last week. Any thought? I have 2009 lancer ES Sports with 233,000.
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post #7 of 7 (permalink) Old 03-09-2017, 12:20 AM
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Take a look at my previous post and the link.

Start with checking for exhaust leaks and then all the easy things.

After that you may need help with the things that have to be diagnosed with special equipment.
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