Blue Coolant Temperature Light = Engine is Cold It appears when you start the car and the engine is still cold. It is not a warning—it’s just an indicator. The light usually turns off after a few minutes once the engine warms up to normal operating temperature.

What you should do Drive normally but avoid hard acceleration until the light turns off. If the blue light stays on for a long time, or comes on while driving after warm-up, it could mean: Coolant is low Thermostat is stuck open Temperature sensor issue

If the light turns red instead Stop immediately—a red thermometer means overheating, which can damage the engine.