Question about 2002 Kia Rio

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2002 kia rio rxv..check engine light came on..

Hi there,

So, I replaced the air filter in the car, and had an oil change done. 3 days later the CHECK ENGINE light came on. It stayed on for 1.5 days. I checked (and topped up) all fluid levels (which were all normal anyways). The next day, the check engine light was still on when I went to work, but when I drove to a friends for lunch, it wasn't on (and hasn't been on since)...a friend of mine said it was possibly a faulty censor..what do you think?

ps...the car is running as normal..no stalls,no leaks and no weird smells...

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  • precious_pud Jan 30, 2009

    How do I test the O2 sensor? Do I need to take it into the shop for that? How much does that cost to fix? Thanks so much for the e-mail. I appreciate your help.

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  • 39 Answers

This could be an O2 sensor or sometimes with lower grade gasoline I have seen different cars act this way. If the O2 is not bad try mid to super gas or fuel system treatment/cleaner to see if there is a change. I know in my area there is mostly 10% ethanol which will lower octane. I hope this helps!

Posted on Jan 30, 2009

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Posted on Jan 02, 2017

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