Why is the engine oil light flashing in a car?
2 Answers
Car engine oil light flashing can be caused by engine oil, pressure relief valve, and other reasons. Oil factors: High oil viscosity and strong high-temperature resistance of the oil can trigger the warning signal. The opposite is also true. However, this does not mean that higher viscosity is always better; you should use an oil grade that matches your engine. Pressure relief valve: Incorrect adjustment or malfunction of the pressure relief valve can lead to abnormal oil pressure, causing the oil light to illuminate. Oil quantity: Reduced oil pumping by the oil pump or failure to pump oil due to air ingress can cause a drop in oil pressure, leading to increased wear on the crankshaft and bearings, as well as the cylinder liners and pistons due to poor lubrication. Engine: Excessive scale in the engine cooling system, poor heat dissipation, prolonged overload operation, or delayed fuel injection timing can all cause the engine to overheat.
As a car owner, I would be very alert when the oil light flashes, as it most likely indicates that the oil level is too low or there is insufficient oil pressure. Low oil level could be due to an engine oil leak or long-term consumption from not changing the oil, which is common in older cars with aging seals. Low pressure stems from oil pump wear, a clogged filter, or incorrect oil viscosity, such as oil being too thick at low temperatures. Sensor malfunctions also often trigger false alarms. When I see the light flash, I immediately find a safe place to stop and turn off the engine. I open the hood, pull out the dipstick, wipe it clean, reinsert it, and check the oil level. If it’s below the marked line, I add the same grade of manufacturer-recommended oil. If the oil level is normal but the light still flashes, it indicates a system issue that requires professional inspection—don’t ignore it and continue driving, as it could lead to engine seizure or severe damage. Developing a habit of checking the oil monthly and changing it regularly can effectively prevent such issues.
