Confirm the oil level, then inspect the oil pressure sending unit and its connector on the right side of the engine block. Wiggle the connector and wiring while watching the dash. If the switch tests bad or the leak and warning persist, replace the sending unit; also consider a cluster short or bad printed circuit if the sender checks out.
A 2000 Dodge Neon with about 125,000 miles showed the oil light when turning corners, then it went out under throttle. The light had started only when cold and became more frequent. Oil level checked full, and wiggling the sender connector did not change the light. An expert suggested a bad oil pressure switch, stretched wiring, or a cluster circuit fault, and offered resistance specs before replacement. Later the light flashed on the freeway and the car was losing oil. A shop first suspected a head gasket, then found a broken sending unit, which the owner confirmed as the cause.
