Koup Tcs Problem here.. anyone

Well i have a Forte Koup Sx 6sp and today for the second time in this week ive noticed while driving the highway my tcs off light has turned on, clicking the tcs button does nothing either turn it off or on, both times i have turned the car off and back on and tcs seems to work normal by the button, does anyone have experienced this behaviour? its kinda worrying cause both times have occur on heavy rain days and suddenly figure im driving with the tcs off on wet conditions doesnt make me feel safe.

I just hope this doesnt mean a trip to the dealer, its so a painfull to deal with them...