You can't trust the light sensor, so you need to get a mechanical gauge. A cheap capillary tube one is only $10. You should also change oil. If the engine has over 100,000 miles, you could consider 20W-50 oil. You could also have a problem with fuel or ignition, causing oil dillution. Does it look too thin or smell like gas? It could also be the oil pump is bad, but that is not normally worth trying. The number of miles on the engine would help. But low idle oil pressure is not that important.
Answers & Comments
You can't trust the light sensor, so you need to get a mechanical gauge. A cheap capillary tube one is only $10.
You should also change oil.
If the engine has over 100,000 miles, you could consider 20W-50 oil.
You could also have a problem with fuel or ignition, causing oil dillution.
Does it look too thin or smell like gas?
It could also be the oil pump is bad, but that is not normally worth trying.
The number of miles on the engine would help.
But low idle oil pressure is not that important.
After it warms up it looses oil pressure and power. After it cools down the oil pressure goes back to normal. How do I fix this