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2004 Rio
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99 Posts
Discussion Starter #1
I went out and bought a Scanner from harbor freight that will read live 02 data. My daughters 2003 sedona is throughing p0431 and p0421 codes. Her tag is out and she has no money. So im trying to get this worked out for her. What do I look for useing the scanner to determind wheither its the 02 sensors or a bad cat. Thanks for any help
 

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1999 Hyundai Elantra Wagon, 2003 Kia Sedona, 2012 Kia Sedona, 2007 Hyundai Tucson
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48 Posts
Did someone change the plugs recently?
 

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2004 Rio
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99 Posts
Discussion Starter #3
Got it solved it was bad cats so I took 2 spark plug non folwers drilled a 1/2 inch hole in one of them screwed down stream o2 sensor into that one then screwed that one into the one with the same size hole it cam with then screwed that whole assembly into exhaust. Problem solved no more engine light
 

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Spark Plug Non fouler

Thanks for the that trick I did that 2 weeks ago and it works, I did it on my Kia Sedona 2004. I run it for 170.0 miles and when I went to inspection today it PASS no problem at all. The code throw the scanner P0431 - Warm Up Catalyst Efficiency Below Threshold Bank 2.No more Check Engine Light.

I recommended to every one that have Kia Sedona 2002,2003,2004,2005.
 

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Kia Sedona, Hyundai Elantra
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262 Posts
Cool! Could you please post a picture of the workaround please. Thanks and Merry Christmas!
 

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Code P0431

Hi everyone,I did the O2 Sensor non spark fouler and run it for over 10,000 miles and no more check engine light for the P0431 Code . :)
 
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