code po420 on 2000 Toyota Corolla

how to check to make sure cat. converter is bad

by in Montgomery Village, MD on June 20, 2009
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4 answers 1 comment
ANSWER by , June 21, 2009
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.
ANSWER by , December 05, 2010
how can i check to see that the cat converter is not bad?
ANSWER by , August 01, 2011
I have problem on codep0420
COMMENT by , March 17, 2014
check for p0420 TSB! get toyota to reprogram it. they'll charge ~$100 but cheaper than replacing the Cat.
ANSWER by , November 10, 2010
check back pressure with gauge