[songfromhaven]

sprucegoose,
Thank you for your answer.

I had the mechanic check after my purchase.
Here is the diagonis shown by the shop:
Transimission cooler lines are leaking
also the pressure hose leaking
valve covers gaskets leaking

I think it might be the first problem causes the coolant low light on.

Actually the coolant light on exist since I got the car but I did not pay too much attention to it since it will turn off after I start for a while.
But now it keeps on.
I am concerned if I need go to the workshop get this problem fixed.

Thanks again for your comment.