Faulty Fuel Level Sensor: The fuel level sensor located inside the fuel tank can malfunction, causing the fuel gauge to provide incorrect or false readings.
Electrical Issues: Faulty wiring, damaged connectors, or malfunctions in the instrument cluster (where the fuel gauge is located) can affect the accuracy of the fuel gauge.
Problems with the Fuel Pump: If the fuel pump is malfunctioning or obstructed, it can interfere with the proper functioning of the fuel level sensor and provide incorrect readings.
Computer Issues: Faults within the vehicle's computer (such as the Engine Control Unit or Body Control Module) can disrupt communication with the fuel gauge, leading to incorrect readings.
Faulty Gauge Itself: It's possible that the fuel gauge itself might have a fault or internal malfunction.
Fuse or Relay: A blown fuse or a faulty relay related to the fuel gauge circuit can cause it to malfunction.
Short Circuit or Ground Fault: A short circuit or a grounding issue in the electrical system can impact the accuracy of the fuel gauge.
If you have checked the fuel level and ruled out low fuel as the cause, it's recommended to have your vehicle diagnosed by a qualified mechanic. They will possess the appropriate diagnostic tools and knowledge to identify the specific problem and perform the necessary repairs.