I had a 420 code replaced cat and both o2 sensors. Put over 200 miles on it. on 2001 Toyota Camry

Still have a 420 code insuficent converter. Please advise

by in Mooresville, NC on February 26, 2014
2 answers 3 comments
ANSWER by on February 26, 2014
Run scan data to determine the operating function of the fuel trim, and correct it.
COMMENT by on February 27, 2014
A P0420 has nothing to do with fuel trim. The wonderful USA government mandated that the manufactures have to monitor the cat efficiently. I think cardoclll is correct, you don't have the proper cat on.
COMMENT by on February 28, 2014
Thanks for the info I bought it online , the cheapest one I could find. Not a good idea
ANSWER by on February 26, 2014
Where did you get the catalyst, and was it CARB OBDII approved?
COMMENT by on February 28, 2014
I bought it online from from auto warehouse the cheapest one not a good idea. Thanks

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