i have this code on my what can i do?? on 2001 Toyota Solara

okay so i been having this code for a while i change the cat the sensors and some other parts im spending a lot of money changing parts i went to 4 diffrent repair shops. and the said its the same code their dont know what else to do help

by in Bakersfield, CA on April 25, 2013
2 answers 2 comments
ANSWER by on April 25, 2013
What code?
COMMENT by on April 25, 2013
p0420 that code
COMMENT by on April 25, 2013
Where did the replacement parts come from? Especially the cat.
ANSWER by on April 25, 2013
If the cat is not defective or one last test could be to confirm is no false/unmetered air within the exhaust system. Best bet to have a qualified service center perform a smoke leak test while vehicle exhaust system cold. Good luck.
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