What does it mean when the blue water temperature gauge lights up?

[VanMichael]

Water temperature gauge blue indicates that the water temperature is too low. The situation of water temperature being too low rarely occurs, and it will automatically turn off once the temperature rises. However, if you drive for a long time with the water temperature too low, the engine will not reach the normal temperature, which will lead to poor engine lubrication and cause significant wear and tear on the internal components of the engine. The reasons why the blue water temperature gauge of the car stays lit are as follows: Computer self-check function: This is the self-check function of the car computer before starting, which is normal. In the future, when starting the car, don't be in such a hurry; wait until the computer has finished checking before igniting. Not reaching working temperature: After parking for a long time, the blue light on startup means low water temperature because the normal water temperature of the radiator is between 60 to 80 degrees, and the external temperature of more than 30 degrees is still not enough to reach its working temperature, so its water temperature light remains on.