What Causes a Sudden Drop in Engine Oil Pressure?

[OSophie]

Here are the reasons for a sudden drop in engine oil pressure: 1. Blockage in the oil passage before the oil pressure sensor: During engine operation, oil pressure is typically maintained within the range of 150–350 kPa. If the oil pressure gauge indicates a value below 98 kPa, it can be considered as low oil pressure. A sudden drop in oil pressure is usually caused by severe oil leakage, such as a missing oil passage plug or a ruptured oil passage, which leads to significant oil loss. This results in very low oil pressure during engine operation. 2. Oil pump failure: Severe wear between the oil pump gears and housing, pump shaft and bearings, or a broken pump shaft, as well as failure of the pressure regulation device, can prevent the oil pump from establishing normal working pressure.