No oil pressure

First thing you need to do is check your oil level. If you are pretty low or have no oil at all the message will come on for low oil pressure. If your oil level is full while it is running after a few minutes pull dipstick out and if oil looks foamy then you have an internal oil leak causing the loss of oil pressure. The cause of the internal leak is leaking oil pick up tube seals. To replace the seals you would need to remove the oil pan but that would require you lower the subframe to clear the removal and installation of the pan.