If you suspect that the fuel gauge in your car is broken, it could be due to several reasons. The issue could lie in the fuel gauge itself, the fuel sending unit, wiring, or a fuse related to the fuel gauge.

To determine the exact cause, you may need to perform some diagnostic tests such as checking the fuse, inspecting the wiring for any visible damage, and testing the fuel sending unit.

Fixing the fuel gauge issue could range from a simple fix like replacing a fuse or tightening a loose wire to a more complex repair like replacing the fuel sending unit. The difficulty level of the repair will depend on the specific cause of the malfunction and your level of experience with car repairs.

If you are comfortable working on cars and have some knowledge of automotive electrical systems, you may be able to fix the fuel gauge issue yourself. However, if you are unsure or inexperienced, it may be best to have a professional mechanic inspect and repair the fuel gauge to ensure it is done correctly and safely.