What to do if the fuel gauge doesn't move after overfilling the tank?
2 Answers
There is a small chip sensor at the very top of the fuel float. It might get dirty due to poor fuel quality, requiring cleaning with an eraser. After removing the instrument panel, use a multimeter and a large needle to locate and test the circuit corresponding to the fuel gauge on the panel. Then proceed with the appropriate repairs.
I've also encountered the situation where the fuel gauge didn't move at all after refueling. That time, I was greedy and filled the tank too full. On the way home, the needle was stuck at full and didn't move. I thought it was broken, but after a few hours and using some fuel, it slowly started moving and eventually returned to normal. That was because the float sensor in the fuel tank was submerged in fuel and couldn't read accurately. If it doesn't recover after a day or two, you should check if the fuse is blown or if the sensor itself has a problem, such as the float being stuck or a short circuit in the wiring. When refueling, I recommend not forcing it to full capacity. Stop when the fuel pump automatically clicks off, leaving some space is better for the sensor and the entire fuel pump system, extending their lifespan. Remember, safety first—don't let gauge issues distract you while driving. Stay alert on the highway. If you're still unsure, find a reliable auto shop and have a technician check it with a multimeter. It won't cost much but will give you peace of mind.
