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2000 Toyota Corolla Question: code po420

 

Question

rhoda, 1.8L 4 Cylinder, Montgomery Village, MD, June 20, 2009, 18:11
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how to check to make sure cat. converter is bad

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  • Answer #1

    June 21, 2009, 17:42
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     Master

    Typically you will have a Check Engine Code P0420 or it will rattle, especially in the morning. The code P0420 is common for the 1.8 lire Corollas. see the link below.
    http://repairpal.com/OBD-Code-P0420

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  • Answer #2

    Visitor, November 10, 2010, 15:36

    check back pressure with gauge

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  • Medium-star Best Answer
    Visitor, December 05, 2010, 14:08

    how can i check to see that the cat converter is not bad?

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  • Answer #4

    Visitor, August 01, 2011, 13:08

    I have problem on codep0420

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  • Reply

    wywwwnet, March 17, 2014, 17:34
     Rookie

    check for p0420 TSB! get toyota to reprogram it. they'll charge ~$100 but cheaper than replacing the Cat.

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