Here are the most likely culprits:
* Low Oil Level: The most obvious cause. Check your oil level immediately using the dipstick. If it's low, add the correct type and amount of oil (check your owner's manual). However, even if you add oil and the light stays on, there's still a problem.
* Oil Pump Failure: A failing oil pump is a major issue. The pump is responsible for circulating oil throughout the engine. If it fails, oil pressure drops, leading to insufficient lubrication and potential engine seizure. This is a very serious problem requiring professional repair.
* Oil Pressure Sensor: While less serious than a pump failure, a faulty oil pressure sensor could be sending a false low-pressure signal. A mechanic can test the sensor to confirm its functionality.
* Blocked Oil Passage: Deposits or sludge in the engine could be blocking oil passages, restricting oil flow. This often requires a more significant engine cleaning or repair.
* Worn Engine Bearings: Worn bearings can lead to low oil pressure as they allow oil to leak past them. This is a serious internal engine problem.
* Leaking Oil: A significant oil leak can deplete the oil level quickly, leading to low pressure. Inspect the engine for any visible leaks.
What to do:
1. Do not drive the vehicle. Continuing to drive with the oil light on will likely cause irreversible engine damage.
2. Check the oil level. If it's low, add oil (the correct type and amount specified in your owner's manual), but don't assume this solves the problem. The light may still be on.
3. Have the vehicle towed to a qualified mechanic. They can diagnose the exact cause of the low oil pressure and perform the necessary repairs. Attempting to fix this yourself without the proper knowledge and tools could worsen the problem.
The oil pressure light is a critical warning. Ignoring it can lead to expensive engine repairs or even a complete engine failure. Get it checked out immediately.
