Where is the problem when the engine shuts down due to parking oil pressure?

[DeElliott]

It is generally caused by insufficient engine oil or a malfunctioning oil pressure regulator. The following is an introduction to the oil pressure regulator: Introduction to the oil pressure regulator: The oil pressure regulator is essentially an overflow valve controlled by a diaphragm. The diaphragm divides the regulator into an upper spring chamber and a lower fuel chamber. The diaphragm controls the opening of the overflow valve to maintain pressure balance between the upper and lower chambers. Working principle: When the fuel chamber pressure exceeds the combined force of the spring pressure and vacuum gas pressure, the diaphragm arches upward, opening the regulator valve. Some fuel flows back to the fuel tank through the return port via the ball valve, reducing the fuel pressure. When the pressure drops to the set control pressure of the regulator, the ball valve closes to maintain a certain pressure in the oil circuit from the pump check valve to the pressure regulator.