Well my Hicas light is difrent it come on after a about 15mins and stays on, Not sure what it means? But I have my GTST for almost 6 months and nothing has happend, So I would ignore it.
Also I would check your Altinator seems like it isnt doing enough charge when you are driving.
Also have you tried resetting the ECU disconect your Power terminal from your battrey for 10mins