Xantia 1997 2.0i Fuel gauge and warning light

[LochNessie]

Needle seems to be stuck at 1/2 tank and warning(yellow) light constantly Lighted Up, even when tank is Full.

faulty "sender" the fuel float inside fuel tank is defective?..of yes, can the sender be serviced or I need to replace it?

Thanks in advance for advice

[mickthemaverick]

You may be able to fix it but it is a have a look and go from there job!!

[Stickyfinger]

Tank sender or broken/dry solder on the instrument cluster...

[xantia_v6]

Try unplugging the connector on the fuel sender unit (under the back seat). With it unplugged, the warning light should go out and gauge read empty. If not, you have a problem in the wiring or the dashboard.