See also:

Lamps On Reminder
For vehicles with the lamps on reminder light, it comes on when the lights are in use. ...

Engine Coolant Heater
Your vehicle may have an engine coolant heater. In very cold weather, 0°F (−18°C) or colder, the engine coolant heater can help. You will get easier starting and better fuel economy durin ...

When to Change Engine Oil
Your vehicle has a computer system that lets you know when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving c ...