got in my jeep this morning.got a few blocks from home and the "check gauges" light came on and the oil pressure guage went to zero. pulled over and listened.sounded fine.pulled the oil fill cap off and saw that it was oiling. tapped on the oil pressure sender and the gauge went past 80psi. unplugged the sender and plugged it back on and no change. with the key on,engine off it showed 60 psi! a new sender ($47)and all is normal again.