o2 sensors

I need to know if my '01 sable has two o2 sensors. Thanks

probably has 4. 1 in front of each cat and 1 behind each cat

why would I have two cats? I have the duratec but there's a single exhaust. Am I just suffering from wishful thinking? Is there a cat for each bank of cylinders?

there's a separate cat for each bank of cylinders. There are 3 O2 sensors, the downstream O2 is after the Y-pipe.

thanks doc! appreciate the info.