What Causes the Engine Oil Light to Flash On and Then Off?

[SanLena]

The engine oil light flashing on and then off can be attributed to the following reasons: 1. Insufficient oil level: This reduces the oil pump's output or prevents oil from being pumped due to air intake, leading to a drop in oil pressure. 2. Overheating engine: This can thin the oil, causing it to leak excessively through the gaps and resulting in decreased oil pressure. If the oil pump components are damaged, excessively worn, or improperly assembled, it may fail to pump oil or pump insufficient oil. Improper clearance between the crankshaft and bearings—too tight increases oil pressure, while too loose decreases it. 3. Faulty or malfunctioning relief valve: If the main oil gallery relief valve spring is fatigued, softened, or improperly adjusted, or if the valve seat and ball bearing mating surface is worn or clogged with debris, the valve may not close tightly, significantly increasing oil return and reducing main oil gallery pressure. 4. Incorrect oil selection: Using the wrong or inappropriate oil can increase leakage due to low viscosity during engine operation, lowering oil pressure. Additionally, oil leaks or blockages in the oil lines can also cause this issue.