Citroen Xsara Picasso low fuel warning light staying on petrol gauge staying on red even after filling up

Hi I am Vortash I think I would check my fuses and see if there is any corrosion around the tank fuel sender causing a bad earth , failing that another sender from the scrappy to eliminate one or the other , it could also be just a faulty fuel gauge .. good luck finding it regards Vortash

alrite mate I have the same problem now and then,its when i run my car until theres literally nothing left in the tank mine dont register that i have filled up either but on the next fill up it will register just think it needs a certain amount of petrol put back into the tank for it to reset the gauge,im pretty sure there aint anything wrong with it mate just top up more as this only happens to me when i run the car really low