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08-09-2012
hey guys quick question. my service engine soon light went on and i went to the local auto parts store and got it read. It comes up saying either the o2 sensors are bad or my catalytic converter. Is there any way of knowing which o2 sensor is bad or if those aren't even bad and i need a new catalytic converter or is it just kind of luck of the draw?
Thanks
08-09-2012
Whats the code number?
The code number will tell you what sensor it is coming from.
08-09-2012
Not without the code.
08-09-2012
P0420
08-09-2012
Catalytic Converter
08-09-2012
okay how do you know exactly and where would you suggest to get one
08-09-2012
Have you noticed any loss in power or a rotten egg smell?
08-09-2012
lol no smell and not really in power i've been babying it because it has a 3.4 pulley without headers waiting to get my stock pulley.. when i do start it it seems to struggle a little
08-09-2012
I would clear it and see if it's an anomaly. If it comes back, go with an OEM cat or you will see that code a lot.
08-09-2012
and how are zzp's catalytic converters?
08-09-2012
Not OEM. They are high flow and you will need that code tuned out if you dont want to see it.
08-09-2012
alright thanks and also how would you suggest clearing it
08-09-2012
With a basic code reader (the same thing the parts store read the code with), or aeroforce scan gauge.
08-09-2012
oh sorry i read that wrong... some reason i thought u ment like cleaning it and would autozone be able to do that
08-09-2012
You can try, they won't usually clear codes though. They'd rather you buy the part the code is pointing to. You can buy a cheap code reader, though. They're good to have
Amazon.com: Actron CP9125 PocketScan Code Reader: Automotive
08-09-2012
alright thanks for all your help
08-09-2012
What would the rotten egg smell be from? I put an aftermarket cat on my GTP and I have the rotten egg smell and a check engine light is on. Haven't scanned yet though.Originally Posted by KeithGTP03
08-09-2012
Often, an aftermarket cat will not "clean" the exhaust enough for the computer and through the code. If you do not notice any egg smell or have reduced power an easy fix is a piece of black electrical tape over the ses light.
08-09-2012
Starting in 2000 GM got tougher on the standards in the pcm. Before 2000 you could do almost anything and be ok. What year is the car?
08-09-2012
My car is an 01 and it has an intense racing pcm ( bought the car like that)
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