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#1
11-17-2004, 10:48 AM
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Odds are what?
SES light on again, this time it set code P0420 Catalyst System Efficiency Below Threshold (Bank 1) Reset it and it came on again 3 days later, same code. OK Folks which would it be, O2 Sensor or Cat Converter?
Thanks. 
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#2
11-17-2004, 03:38 PM
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Re: Odds are what?
mine is does that and it is the o2 sensor from what i have been told but i was also told that if your cat converters are clogged or you have them cut out all together that it will set that off as well
i am just dealing with my check engine light because i dont have cat converters
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