Technical Fuel indicator problem

[SakisTorba]

Hello everyone. The fuel indicator suddenly shows that petrol is very low. When the car makes some kilometres the indicator is moving and shows the real level of petrol... What shall I do?

 

[judderbar]

Hello everyone. The fuel indicator suddenly shows that petrol is very low. When the car makes some kilometres the indicator is moving and shows the real level of petrol... What shall I do?

The fuel pump and combined fuel sensor are under the back seat. What happens when you move the connections?