What does low oil pressure mean?

It means exactly what it says, low oil pressure. This means you should not drive this vehicle until you get the problem corrected. The oil pressure is not high enough to safely operate the engine. Otherwise you will have severe engine damage.
It means exactly what it says, low oil pressure. This means you should not drive this vehicle until you get the problem corrected. The oil pressure is not high enough to safely operate the engine. Otherwise you will have severe engine damage.