peugeot 206 1.4 exclamation mark

will have a question 206 I am using a 1.4 xdesing brand vehicle yesterday I had maintenance yesterday today the exclamation mark appeared on the car was flashing with the stop, then I added the brake hydraulic oil, but the exclamation mark is always on when the vehicle is not working, even if I do not apply the hand brake, When I start the car, I pulled the handbrake and it does not flash, no problem, it does not go out without starting, is it always lit, if the other hand brake is not applied in other vehicles, it does not light up & nbsp;