* Low Oil Pressure: Even with enough oil in the sump, the oil pump might not be generating sufficient pressure. This could be due to:
* Failing oil pump: The pump itself might be wearing out or failing.
* Clogged oil filter: A severely clogged filter restricts oil flow.
* Worn bearings: Worn crankshaft or camshaft bearings allow oil to leak past, reducing pressure.
* Blocked oil passages: Sludge or debris can clog oil galleries within the engine.
* Leaking oil cooler: A leak in the oil cooler will lower pressure.
* Faulty Oil Pressure Sensor: The sensor itself might be malfunctioning, giving a false reading of low oil pressure. This is relatively inexpensive to replace but needs professional diagnosis to ensure it's the actual issue.
* Wiring Problem: A short circuit or break in the wiring to the oil pressure sensor or the oil light could also trigger the light.
What to do:
1. Don't drive the car: Driving with low oil pressure will quickly ruin your engine.
2. Check the oil level again: Double-check the oil level with the dipstick to ensure it's actually full and within the acceptable range.
3. Check the oil pressure gauge (if equipped): Some cars have an oil pressure gauge. If your Leganza does, observe its reading. A low reading confirms low oil pressure.
4. Inspect the oil filter: Ensure it's not severely damaged or clogged. If you're comfortable, try removing it (being careful with hot oil) to check for blockages. But replace it anyway if you do this.
5. Get it to a mechanic: A qualified mechanic should diagnose the problem. They will use a pressure gauge to accurately measure the oil pressure and identify the root cause.
Ignoring the oil light could lead to severe engine damage, requiring costly repairs or even a complete engine replacement. Get professional help immediately.
