Problema de caixa automática Renault Megane

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, Eu desligo o carro e ligo -o e removo ????

Pode ser 2 coisas As válvulas eletro da caixa automática
ou do
óleo de PS quando as válvulas eletro não estão funcionando, dão energia perdida,
além de ligar a testemunha,
mas primeiro tenta alterar o óleo