What are the reasons for the oil pressure warning light coming on when there is sufficient oil?

[DeJeremiah]

Reasons for the oil pressure warning light coming on when there is sufficient oil: 1. The engine temperature is too high, which can thin the oil, causing it to leak excessively through the gaps and leading to a drop in oil pressure; 2. If the oil pump components are damaged or have excessive gaps due to wear or assembly issues, it can result in the oil pump failing to deliver oil or delivering insufficient oil; 3. The fit clearance between the crankshaft and the big or small bearings can affect oil pressure—too tight increases pressure, while too loose decreases it; 4. Blockages in the oil filter or oil suction screen can also reduce oil pressure; 5. Using the wrong oil or an incorrect oil grade can cause excessive leakage due to low oil viscosity during engine operation, thereby reducing oil pressure.