I unplugged the top o2 sensor which is in the exhaust manifold in front and reset the codes. After driving a while I still got the same code and one for the unplugged sensor. How many o2 sensors are in this car? The one I unplugged is obviosly not the one giving the code. I can see only one more behind the motor. Should I replace or look for something that could cause the code. I have already checked all wires and connections. The weird thing is, it will come on and stay on a few days but then go away for a couple weeks. Any help is much appreciated.
