fuel gauge not accurate

[peugeot576511]

Anyone know that how to overcome this problem?
-(2.0 petrol) my 406's fuel gauge seem to show the fuel is 1/2 of the tank but actually it just left about a few kilometre to travel....and never goes less than 1/2 of the tank even it is empty......and i have already stuck in the middle of the road a couple of time already....=( .....................so any suggestion to overcome it?

[lozz]

Couid be : A faulty sender.
or gauge, bad connecton or bad earth,

[peugeot576511]

but my float already change.....no difference
so as you said should i check the suis behind the speedometer?

[madmadmax]

there are sum electrics in the drivers foot well thats got a fuel level feed in it