I work at autozone and i have the same question. I cant access it through our work computers and there is no way to access this info from home.
I some cases. They can not if there are parts to be removed to gain access to the light. They can not be outside for very long.
If your car has OBD2(96 and newer) they will hook up a code reader. If you do have a bad O2 sensor the scanner can tell which one is bad. Most v6 and v8 engine have 4 sensors.
No. Against Policy. Ask if you can rent one or clear the code yourself.
Not that I'm aware of because I've tried. I'm a store manager and had to order mine on DOC (daily online communication) and even had to start an account. Also, be aware you can buy your shirts and pants at any thrift store and save yourself a heap of cash. Just make sure pants are black, and shirts are position appropriate (red, gray, I wish I could wear black, but SM still gray), have no holes in it, and have no logos. Unless you wear an apron all day battery acid will ruin your shirt whether you paid $3 or $18. Hope that helps