Low Oil Pressure Indicator Does Not Come On With the Ignition Switch In ON (II)

Low oil pressure indicator stays on

Check the engine oil level Testing and Inspection.

Do the low oil pressure indicator circuit troubleshooting (Short) Low Oil Pressure Indicator Circuit Troubleshooting - Short.

Test the oil pressure switch Testing and Inspection.

Check the engine oil pressure Testing and Inspection.

Check the oil filter for clogging.

Check the oil screen for clogging.

Check the relief valve Overhaul.

Test the oil pump Overhaul.

Also check for

A wire shorted to ground between the PCM and the oil pressure switch