Thank you guys for your inputs. Actually when I pushed the Driving Mode Button, the ECO or Sport Mode light do not go off. So I opened the Center Console. The Blue Wire of the connector was cut. I connected it and everything went okay. I can Toggle from Sport to Push Normal then to Eco Mode.
Curious if it was on sport mode and you turned the engine off, and when you turned it back on, did it stay on sport mode? If so, then the previous owner figured out how to keep it on sport mode full time.
Obviously I haven't tried this, but from an electrical engineering standpoint I can't see how that would work. The switch works by closing a contact which tells the computer to engage sport mode. I don't see how disconnecting that switch, which would then permanently keep it in open mode, would ever engage the sport mode again.