Re: Catalytic Confusion
First check for any leaks at the exhaust manifolds and pipes, because this can influence the O2 sensor readings. Secondly i would put a scanner which shows live data on the jeep, to see how the O2 sensors are behaving. The two before cat sensors (bank 1 and bank 2 upstream sensors 1-1 and 2-1) should fluctuate between 0.2 and 0.8V. The more frequent they change, the better the O2 sensor is. The code you have is for bank one, so you should look at the 1-1 sensor (but can use the 2-1 as a comparison)
If this looks ok, then look to the downstream sensors (the 1-2 and 2-2 sensors). These sensors should give an almost steady output voltage. When the catalitic converter doesn´t work well, then the O2 output will start fluctuating like the front sensor.
To look at the O2 sensors voltages, the engine should be warm (closed loop mode), otherwise the PCM (powertrain control module) will not use the O2 sensor readings (open loop mode) and the 1-1 and 2-1 sensors will not fluctuate. Also if you don´t have a scanner with live data but you do have an android phone, then you could buy a cheap ELM 327 bluetooth dongle (+- USD 15 from e-bay or Amazon) and download the free app "Torque". This app also shows you PCM fault codes and can errase them.