You will need to remove your oil pressure sending unit and install a mechanical gauge to get a true reading. You need to start out cold and write down the pressure reading and also once it warms up to operating temperature. If the pressure gauge is not the same as the mechanical one you have a bad pressure switch.
the oil pressure sending unit is designed to warn you of a low oil pressure. If the sensor goes bad then the low pressure light or gauge will read low when the oil pressure is actually ok.
Defective gauge, defective oil pressure sending unit, low of oil, defective oil pump.
If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.If check gauges is lit and the oil press gauge is low, you have low oil pressure or a failed oil pressure sending unit.
Install a manual gauge to actually read oil pressure
Low oil pressure or a defective oil pressure sending unit.Low oil pressure or a defective oil pressure sending unit.
1999 Chevy table oil pressure gauge low and check gauges flickering
A mechanical oil gauge may bounce if you are low on oil. An electric oil gauge may bounce if the sending unit or the gauge itself is faulty and of course you are low on oil.
Oil level and oil pressure are different. You don't need to have full oil to get normal pressure.
The dipstick reads full to low, generally 1 qt difference. The engine can run with normal oil pressure 1 qt low. Anything below that is asking for trouble.
Low oil, no oil pressure, bad sending unit, wiring, bad gauge,.............
Your dipstick is the obvious sign. ( I trust you know about the dipstick .) Your oil pressure gauge is another warning--low oil pressure can be caused by not enough oil.
Low oil level, low engine rpm, low oil pressure, failed oil pressure sensor.