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