Renault Megane Automatic Box Problem

Hello, how do I have a megane Renaul 2002 Automatic The problem I have is that when I take a long road, a sensor is activated is a palanquit that says automatic it takes it for the scarge and tells me to whether oil pressure regulation is a sensor or that where the other would be the other would be the old oil can be or such a filter that it is covered but that I know the box is sealed and to be to if I do not forget that When this sensor is activated, I turn off the car and turn it on and remove ????

It can be 2 things the electro valves of the automatic box
or the
PS oil when the electro valves are not working bn give lost power
in addition to turning on the witness
but first tries to change the oil