You get a too lean or rich fuel code on 1998 Windstar and recommendation to change the heated 02 sensor bank 2 sensor 1 so how do I change it and where is it located?

Answer 1

Why blame the sensor?The sensor is reporting the data - so people tell you to replace the sensor instead of finding out WHY the data is triggering the codes?

Do people buy new thermometers every time one reports they have a fever?

There are codes that very specifically address a sensor failure.

Too lean and Too rich are obviously very different and you're not ever going to get both at one time.

More specifics regarding the actual codes being triggered and then much more research.
Your O2 sensor will be located either in the exhaust manifold (I think that's the most likely spot) after the collector pipe, or it will be in the exhaust pipe prior to the catalytic converter. You should be able to get an open end wrench on it and it will unscrew. If it's in the manifold, there might be some heat shielding in the way that you'll have to remove. They make special sockets that have a channel for the wires to fit into, which would make removal much easier (no need to worry about heat shielding). There is likely a second O2 sensor after your catalytic converter, but (somebody correct me if I'm wrong), the O2 sensor that determines air to fuel ratio is the one that is before the cat, and that would be the one giving you the error.