Why doesn't the dashboard display fuel consumption and shows no information????

My 2.8t diesel has been driven for three years and 94,000 kilometers. The fuel consumption is still high. Does anyone have a good solution? The current display shows 10.4. With 500 RMB worth of fuel, the range display shows 550 kilometers. The fuel price here is 6.83 RMB.

How do I display the fuel consumption on the dashboard of a Volvo C30?

What is the fuel consumption displayed on your dashboard?

What does your urban fuel consumption display show?

Is there a way to change the fuel consumption display from km/L to L/100km on both the dashboard and the main screen?

The instantaneous fuel consumption display has disappeared. How can I get it to show up again?

Why doesn't my fuel consumption display anymore? It's always showing "——————".

Experts, is the fuel consumption display accurate? [facepalm]

How to adjust the fuel consumption display on the dashboard? It recently changed to something else, showing 33km like that. How can I change it back?

How is the average fuel consumption displayed on the Hongqi H7?