From time to time, over the past year or so, I get a message along with a constant chime saying, "Stop Engine--Low Oil Pressure." It goes away after I stop the car and restart it. After a few times I took my car (2000 Cadillac Deville--well maintained with 62,000 miles) to the Dealer and they could only find a few minor oil drips which they offered to fix (requiring the removal and replacement of the engine and transmission ) for over $5,000.(I didn't bite.) I have since gone to my regular mechanic who checked the oil pressure with a gauge (pressure was ok)and tried to find the sensor sending the message (couldn't). When the message is displayed there is no noise coming from the engine and no other smoke or smell. Should I continue just stopping the car and restarting it or is there something else to check. I'm retired and drive about 5,000 miles a year or less. I live in Florida.