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p0420 code
i figured out my previous problem (o2 sensor code and i was getting horrible mileage) by cleaning my maf sensor off which made the CEL go away for a couple days (on its own) and i also cleaned the throttle body. the other day i was driving, and the check engine light came back on. i went to autozone thinking it was going to be the same o2 sensor code but it was a p0420 which is low catalyst efficiency.
soo... could it have been that i was running rich all that time that killed my cat converter?
and why the hell did it wait until AFTER i fixed the rich running to appear
this is a 3400 v6 just for the record..
Last edited by mastershake : 03-21-2011 at 04:23 PM.
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