Oil pressure warning light: what it means and what to do

What it means

• Mazda: the light indicates low engine oil pressure. Don't run the engine if oil pressure is low, because it could result in extensive engine damage.
• Volkswagen: a red oil pressure light means stop the car as soon as it's safe, switch off the engine and don't restart it until you've checked.

What to do

1. Pull over safely and turn the engine off.
2. Mazda says to wait about 5 minutes for the oil to drain back, then check the level on level ground.
3. If it's low, add the correct oil without overfilling. If the light stays on with a correct oil level, or after adding oil, don't drive. Have the car towed.
4. Brakes and oil pressure warnings need immediate attention. Don't 'limp home' on them.

Sources

1. Mazda USA owner's manual (2018 CX-5): Warning/indicator lights (engine oil, brake system)
2. Volkswagen UK: Engine oil pressure warning light (red)