What does it mean when it says 'Abnormal oil pressure, please turn off the engine'?
2 Answers
Abnormal oil pressure prompting engine shutdown is typically caused by an oil filter check valve issue. If the oil filter is ruled out, there's likely a check valve beneath the oil filter that needs replacement. Below is relevant information about oil pressure regulators: 1. Definition: The oil pressure regulator is essentially a diaphragm-controlled overflow valve. The diaphragm divides the regulator into an upper spring chamber and a lower fuel chamber. It controls the opening of the overflow valve to maintain pressure balance between the two chambers. 2. Working principle: When fuel chamber pressure exceeds the combined force of spring pressure and vacuum pressure, the diaphragm arches upward, opening the regulator valve. Some fuel then returns to the tank through the return port via the ball valve, reducing pressure. When pressure drops to the regulator's set control pressure, the ball valve closes to maintain proper pressure in the fuel line between the pump check valve and pressure regulator.
That day on the highway, I suddenly saw the dashboard display 'Abnormal Oil Pressure, Please Turn Off Engine,' and broke out in a cold sweat. I immediately pulled over, shut off the engine, and called for roadside assistance. The mechanic said it's like when human blood pressure drops too low—insufficient oil pressure causes metal-to-metal contact inside the engine, which can destroy the entire engine in just minutes. Common causes include oil leaks, a failing oil pump, or occasional sensor false alarms. Remember: if you see this warning, shut off the engine immediately—don't try to push the distance. A friend of mine once stubbornly drove home and ended up spending over 30,000 yuan to replace the engine. Make it a habit to check the oil dipstick regularly, especially with older cars.
