If the oil pressure light stays on, what does it signify?

When the oil pressure light remains illuminated on your dashboard, it indicates that there is a problem with the oil pressure in the engine. Specifically, it can suggest that the oil level is low, which can decrease the lubrication necessary for the engine's moving parts, leading to potential engine damage. Additionally, it can also mean that the pressure relief valve is stuck, preventing the proper circulation of oil and affecting the oil pressure readings.

High oil pressure is essential for maintaining engine health, as it ensures that oil is flowing adequately to lubricate parts of the engine. Hence, if this light is on, it's crucial to check the oil level and consider having a mechanic inspect the system to prevent any significant engine damage.