When the letters SYS flash on the left side of the odometer display, the CCM is detecting a component failure code. If the failure code is present the light will stay on, flashing SYS (sometimes mistaken for 5Y5). If the problem is intermittent the SYS may go away and periodically reappear as a reminder to take the car into the dealer. The failure code will be either put into history or current CCM memory, thus helping the dealer resolve the problem. The dealer will see the letter H or C before the failure code number.
This is usually caused by your battery going bad