Peugeot Malito!

But not the switchboard in that case would be the BCI the switchboard does not command those things only calve

Hello:
your problem may be smaller than it seems. Have you tried changing the fuel tank cover? . Modern vehicles are equipped with plastic tanks, which nese "breathe", since they dilate and contract precisely because they are plastic, and by the same weight of the fuel. If the lid seals hermetically, not enough air will enter so that the tank is inflated, and the meter will mark as it is full, when it really is not.
It is as if you drank a bottle, without leaving room so that the liquid comes out between the air .. Do I explain myself?
Luck!

Greetings from Córdoba, Argentina.

I ask, it can't it be that you have air in the tank and you are badly marking the level?
To look at that when you are walking and stop, at that time you have to get off and open your deposit where you load fuel and if you hear like the tank as it is deflated it is because you had an air problem.

I think your problem is in the aforerator, you must substitute it, but keep in mind that these aforers need an initial learning, if you put a new one and do not follow the steps will not work, tell your mechanic to be reported in the concessionaire. Greetings and luck