[new0rder]

thank you all for the reply, I added 1 liter of BMW coolant, and the light is not light up anymore. I do notice when I turn my cap before, it was loose and the click arrow wasn't in the right spot, I have a feeling some guy check it before and didn't turn it back all the way until it clicks. so its a slow leak.

also wanted to update this is the sign of water pump/ thermostat is going. I replace both this month since I been getting over heat light when ever I turn on the heat. after replacement everything is good.