Hi guys, sorry for the long time without appearing.
I can't know the code error. We are newbie in this kind of mechanical issues, and trying to know more about it so we don't have the gadget that allow us to do that buy we will buy it next monday.
Answering pacman question, the fuel needle moves as the others do and after that, it remains on full position.
According to this "it could happen that fuel sensor unit is not working, and it's always placed at its highest level." we will go this evening to the gas station in order to know if there's something wrong that with a filling can be solved.
Thanks.