Oil level indicator fluctuates but has oil

maybe carbon dioxide emission code

It is directly behind the heaslight switch in the dash/.

fuel level sensor but rare problem if u have other problems with cluster bad ground
due to dirt.wiring is around fire wall a good day wd40 & wirebrush
u will dicover things will be working beater & some things that wernt working is now working

How do you know? Could be the oil cooler (where the oil filter bolts to the engine)

how can i get the code to the lock on the driver door if im lock out

Got a schematic?

only by crossing the low presure cut out switch,,,but if it wont come now,then the ac control is telling u ,,that there is a ac problem that needs to be serviced

It is most likely the transmission.

A common problem in the continental (my 95 had the same problem). You can TRY to reset the error. The link below lists step by step instructions for the error reset. Best of luck.
Greg

http://www.synthetic-direct.ca/technical/reset_oil_service_light_lincoln.htm

have you replace the caliper? if you did then when you stop loose the bleder of the caliper and if pressure come out tie the bleeder again and haved your mechanic remove the brake master cylinder and see if there is any adjustment for the push rod or shaft behinf the master cilinder and loose the adjustment to make it short but if there is no adjustment then leave the master little loose and if this take care of it you might have a wrong master installed or just need to adjust the rod behind master good luck