Question about Hyundai Sonata

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Oxegen sensor keeps burning out

I have a check engine light on my 1999 accord. it indicated a bad oxegen sensor. i replaced the sensor and it burned out on me twice and the check engine light keeps coming back on obviously. what keeps burning out my sensor? what can i do?

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  • jasenycbx Feb 15, 2009

    P0420 catalyst efficiency below threshold, bank 1

  • jasenycbx Feb 15, 2009

    so do i need to replace both 02 sensors when i change the converter? my car has 2, one before the converter and one after.

  • jasenycbx Feb 15, 2009

    ok. thanks alot for your help.

  • mike loshbough
    mike loshbough May 11, 2010

    what code is it?

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The converter needs replaced the ceramic has broken down. this will fix the problem.thanks for clearing up what code

Posted on Feb 15, 2009

  • mike loshbough
    mike loshbough Feb 15, 2009

    only if they are not changing properly this can be seen with a scanner.more times than not they will be ok.

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