What does the blue light on a car mean?

[VonMichael]

Car blue lights have two meanings: low vehicle coolant temperature and high beam indicator. Here are the detailed information about car blue lights: Blue coolant temperature light: Indicates the coolant temperature is too low. If it lights up blue when starting the car, it's normal and will turn off after the engine warms up; if it stays blue continuously, there might be an issue requiring inspection at a repair shop. The blue coolant temperature light indicates low temperature - it will turn off after driving for a while or idling until the temperature rises; red indicates high temperature and the vehicle should not continue driving. The blue or green coolant temperature indicator on the dashboard is a normal low-temperature warning light, showing the engine has just started and is warming up. Avoid aggressive driving during this period as low temperature can cause severe engine wear. The light will turn off when reaching optimal operating temperature. High beam indicator: When the vehicle's high beams are activated, a blue symbol will light up as a normal indicator.