You may have a blown fuse.
About 8-10 liters.
If a 2000 Honda Accord gas light stays on the fuel sensor may be failing. Running a diagnostic tool will show if the fuel gauge sensor is malfunctioning.
you need a newvoltage reducer
Sell the car for less than you think it is worth and get rid of the problem.
why won't my gas gauge work all the time.it will read full when i fill it but after that as i drive i am not sure how much gas is in the tank
on some vehicles the gas light will still work if the gauge does not. on some vehicles such as an 1985 Toyota cressida have a separate sensor allowing the low fuel light to illuminate.
Diana
Then fix it
A bad sending unit in the gas tank.
Your gauge could be bad but sometimes the floats in the gas tank get holes in them and fill with gas. this causes the float to stay at the bottom and your gauge to read empty. U might also check the wiring from the sender at the fuel tank to the gas gauge itself.
Check the fuses.