Cars require frequent service. Luckily, most of the vehicles we drive today have sensors and lights that can inform us of any problem with a specific part. One common issue with cars is low oil pressure, and it is essential to know what causes it and how to fix the issue when its light appears on your dashboard.The car engine is made up of several moving parts that rub against each other at high velocities. To prevent friction, a film of pressurized oil helps to lubricate these parts. The pressure is generated by an oil pump run by the engine. Aside from that, the oil helps to cool the engine and protect the metal parts. The pressure threshold varies depending on whether the car is stagnant or moving, but if the minimum value is not attained, an oil pressure sensor will light the warning signal on the dashboard.