fuel gauge is not working properly, what is the cost of replacement on 2000 Ford Taurus

gauge bounces from empty to full

Asked by for the 2000 Ford Taurus
1 answer
HAVE A MECHHANIC CHECK THE GROUND CIRCUIT FROM SENDER TO GAUGE.
POSS. BAD GROUND,SENDING UNIT OR GAUGE. DEPENDS ON PROBLEM AS
TO HOW MUCH IT WILL COST TO REPAIR.