1994 Oldsmobile Cutlass Low oil light stays on

1994 Oldsmobile Cutlass

I wrote to you that my cars low oil light stays on but if you shut the car off and start again it is off. The oil is full not low or over. The sending unit has been replaced. No sounds come from the signal. It comes on every time you turn it on and goes off everytime you imm turn it off and back on and stays off until you stop the car for a period and it will come back onn? This is driving me crazy. I stopped by a garage and they said to ignore it but I worry I am hurting the car. I am handicapped and I am frightened that it may stop and I cannot get help.