hey i need help i need help with this code
Jun 1, 2003 | 04:21 PM
#1
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Formerly one92rs
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From: league city texas
hey i need help i need help with this code
i am getting a P0420 code--catalyst system efficiency below threshold (bank 1). has anyone had this code and if so what solved it. 
Jun 1, 2003 | 04:34 PM
#2
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From: Chicago
Re: hey i need help i need help with this code
I have had this code many times before, its either the post cat 02 sensor or catalytic converter. To test either item you need some serious diagnostic tools, some times i've had this code the ECU my company calls it has needed to be reflashed.
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