p0420 code

mastershake · 03-21-2011, 04:20 PM

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..

mastershake · 03-21-2011, 04:25 PM

omg this is a thread about a p0420 code and i posted it at 4:20. i think its a sign i need to engage in illegal smoking activities..

widbyj · 03-21-2011, 05:49 PM

that's what she said...

Odds are that the ECM ignores O2 errors when it has more serious problems. The CAT may have died but it could also just be a fouled sensor. I'd change the sensor first cause it's easier and cheaper...

Redog · 03-21-2011, 06:09 PM

Quote:

Originally Posted by mistershakez

omg this is a thread about a p0420 code and i posted it at 4:20. i think its a sign i need to engage in illegal smoking activities..

Why don't you share a fat blunt with your car and maybe the 420 code will go away

mastershake · 03-21-2011, 06:15 PM

Quote:

Originally Posted by Redog

Why don't you share a fat blunt with your car and maybe the 420 code will go away

bahahaha