CHECK ENGINE DEL CHARADE

People, I have a 1991 Charade 1.3 Motor of 16V injured. I was lit by the light of check Engine but I think it's because I disconnected an electronic valve that was bad and I was getting it for several days. I already got it, I changed it, but the light does not go out. Does anyone know how the code deleted so that that light goes out?

Thank you.

1991 And is it injected? Well proof disconnecting the battery for 30 seconds and then opens and closes the contact 3 times at intervals of 25 seconds between you open and close at the end of the series you start and now. It works on almost all models, in which you don't have to do it with the scanner and see the fault well, sometimes it is cheaper to scanner to save money.

Thanks for the data. Figure that I disconnected the drums for five minutes and with that it was enough. Ready.