Toyota Repair: Toyota Camrey 1994, valve cover gasket, pressure gauge

Question
Oil light is on all the time. We replaced oil  pressure sensor.  We replaced valve cover gasket.  Please let me know what should I check and how to make  the light off.

Answer
The oil pressure should be checked with a mechanical pressure gauge to make sure that it's not a mechanical problem such as a restricted oil pump, if the oil pressure test is good then there may be an electrical problem that keeps the light from going off.