My oil pressure warning light started "chirpping" about a month ago after an hour or so of use, now, after coming to operating temp., the oil warning light/buzzer goes off full blast. I have about 50 - 60 hours on this oil change, and there is plenty of oil. Any way to check for a faulty sensor? Anything to look for? I live in the Caribbean and use 40w oil year round. Engine runs fin, and no smoke, etc. Thanks, Steve