o2 Sensor problem

[thermal]

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.