You can take a little relief in the fact that since you have a '95, you only have two o2 sensors. I wouldn't mess with replacing only the one that is giving you the code though. Chances are the other one is not working well either. You'll notice a jump in gas mileage when you change them.

Dueling Duratecs '95 SE V6 MTX 0 Mods '04 Mazda6 S Wagon '03 Kawasaki Z1000 But thus do I counsel you, my friends: distrust all in whom the impulse to punish is powerful! Friedrich Nietzsche