o2 Sensor problem

Originally posted by thermalfi'd16
Too rich. Do you happen to have a high flow exhaust system? DO you have a stock cat? The primary O2 sensor will malfunction if you are holding back the exhaust gas..... this will happen if you do NOT have a high flow cat. It will cover the whole sensor with carbon build-up. You can use an O2 simulator as well. You can even build your own. Go to my website.

Also since you extended the wires, recheck to make sure you have good conductivity and that all wires have decent contact. Carefully inspect the wires for any sign of possible exposed wire.

Ya, i have a high flow cat and exhaust system. 3" cat and 3" piping, i can't get anymore hi-flow than that.

Also, i checked the voltage on my wires and white wire is 1v and the green is 12v, and both the grounds are grounded, so i'm still pretty unsure. I even took out the o2 sensor the other day and theres only a speck of carbon build up. not a while lot, but it may have been enough to make it throw a CEL?