What does it mean when the yellow oil can light comes on?

[Dennis]

The yellow oil can light is the engine oil pressure warning light. Below are the specific reasons why the light may come on: 1. Insufficient engine oil level: This reduces the oil pump's output or prevents it from pumping oil 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; 3. Oil pump failure: When the oil pump components are damaged or excessive gaps occur due to wear or assembly issues, the oil pump may fail to pump oil or provide insufficient oil; 4. Reduced oil pressure: Improper clearance between the crankshaft and the bearings (too tight increases oil pressure, too loose decreases it).