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Hi, my 2005 kia rio with about 110k miles on it was diagnosed with a p0420 error code. I've read a lot on the forums about faulty 02 sensors on our rios, what are the chances that this could be the root of the problem?
 

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2002 Kia Rio, 2011 Kia Sorento 2005 f 250 1996 geo metro 1992 f 150
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1,023 Posts
Change the O2 sensor and see where it goes maybe you'll get lucky
 

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2012 Kia Soul+, Kia Sportage SX FWD
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Hope it is the O2 sensor.....otherwise start saving your money for a new cat. 130K seems to be the point they all go..... And you're almost there.
 

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2002 Kia Rio, 2011 Kia Sorento 2005 f 250 1996 geo metro 1992 f 150
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1,023 Posts
Amen kevster, I was trying to be positive, Hopefully it's not a cat problem save up some money like kevster say's if it is. They aren't cheap. Reguards Ronjohn
 
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