electrical problem

I think Lexus used a yellow Icon to show a rear bulb failure (brake or tail light) and a red Icon to show if the brake fluid was low or the emergency brake is on. If the red light is on see if the brake fluid is low (if so check for leaks or brake lining material to be worn). If it is a bulb failure light I wonder if the wrong bulb is in one of the sockets for examp0le wrong wattage or a single instead of a double filament bulb.