I have a 2000 Taurus SES (24v/dohc v6) and of late, the "Low Engine
Coolant," warning light has been coming on for no apparent reason. The
temp guage (the binary C-H type FWIW) shows the temp in the normal
range, and a visual inspection of the coolant resivoir shows plenty of
coolant in it.

The light will come on either hot or cold and may go out after either
shutting down for a few minutes or while driving will go out on its own.

The dealer where I usually get the car serviced dismisses it as a bad
sensor. I, however, don't feel comfortable driving a car that is giving
me bad information if this is true - especially as I take this car on
road trips; my position being that one day, the coolant will actually be
low and I ignore the warnings and wind up on the side of the road.

Any Ford gurus out there that can give me some insight on this problem?
Should I probablly be looking for another mechanic as well?