What causes the low oil pressure warning to disappear after restarting?

[AdelineRose]

Introduction to the causes of low oil pressure disappearing after restart: Before the car is started, the residual pressure in the engine oil passages is very low, causing the oil pressure warning switch to close, which illuminates the oil warning light. After the car is started, the oil pressure in the passages rises to normal levels, opening the oil pressure warning switch, so the oil warning light turns off. Here are the recommended solutions: 1. If this situation occurs, immediately turn off the engine to avoid serious mechanical damage. Then remove the engine oil pan and thoroughly inspect for leaks and check the oil pump. 2. If the low oil pressure warning suddenly appears while driving, the first thing to check after stopping is whether the oil pan is leaking. This is simple—just crouch in front of the car and look under the engine. If there is a leak, the oil pan will be covered in oil stains, and oil may even drip onto the road. If this fault occurs suddenly during normal driving, the likelihood of oil pan damage is very high, such as a cracked oil pan or a missing drain plug.