Low Oil Pressure Indicator Does Not Come On With the Ignition Switch In ON (II), or the Vehicle Ignition In the On Mode
Low oil pressure indicator does not come on with the ignition switch in ON (II), or the vehicle ignition in the ON mode
Do the low oil pressure indicator circuit troubleshooting (Short) procedure Low Oil Pressure Indicator Circuit Troubleshooting - Short.
Test the oil pressure switch Testing and Inspection.
Also check for
A wire shorted to ground between the PCM and the oil pressure switch