Figure I would help give a bit more info for background on how the system functions.
Yes the sensor in your exhaust is called an O2 sensor, but it detects more than just O2, they usually measure 4 gasses, sometimes even 5.
Here is an article that might shed a bit more light on how the systems integrate together. Not everything applies to the crossfire per-se, but the general process is similar in all cars.
http://www.autoshop101.com/forms/h56.pdf