O2 Sensor Question

[alero_ecotec]

When i had my custom exhaust done I bought an OBD-2 compatible cat from Magnaflow with an O2 sensor bung at the end of the cat, hoping to avoid any check engine lights. Of course, i still threw a CEL after a while of driving. So, my question, is there an 02 simulator i can get to just make this a quick fix? i cant seem to find one anywhere, or would i be better off buying a cheap OBD-2 reader/clearer and clearing it every 500 miles or so?

[Redog]

PFYC has one

[alero_ecotec]

it says it's only for the v-6 and 2.4L, and i've read on here that the one for the 2.4L doesnt work on the ecotec

[Fast Eddie]

are you talking about the pre-cat sensor or the post cat sensor? I thought the sim was only for the post cat sensor? which code are you throwing? That will tell you which sensor and what the PCM "thinks" the problem is.

[alero_ecotec]

post-cat, not sure which code i'm throwing, i dont have an OBD-2 reader

[Fast Eddie]

autozone will read that poop for free. Get it read and you will know which sensor is to blame ;)