What Causes the Oil Light to Illuminate When There is Sufficient Engine Oil?

[DiAlejandro]

The reasons for the oil light illuminating when there is sufficient engine oil are: 1. Clogged oil passages; 2. Low oil viscosity; 3. Issues with the oil pump; 4. Problems with the oil sensor; 5. Electromagnetic interference. The functions of engine oil include: 1. Lubrication and friction reduction; 2. Assisting in cooling and temperature reduction; 3. Sealing and preventing leaks; 4. Rust and corrosion prevention; 5. Shock absorption and cushioning. The steps for changing engine oil are: 1. Lift the vehicle, remove the undercarriage shield, and place a container of about 10 liters beneath the oil drain plug; 2. Unscrew the oil drain plug, use an air gun to blow for two minutes at the oil filler port, then tighten the drain plug after draining and wipe it with a tissue to check for leaks; 3. Reinstall the undercarriage shield, lower the vehicle, and use a funnel to add oil through the filler port.