Possible causes for an inaccurate fuel gauge reading in a 1998 Dodge Avenger include:
* Faulty Fuel Level Sensor: This is the most common cause. The sensor in the gas tank might be malfunctioning, sending incorrect signals to the gauge.
* Wiring Problems: Wires leading from the sensor to the gauge could be damaged, corroded, or disconnected.
* Gauge Malfunction: The fuel gauge itself could be faulty.
* Bad Ground: A poor electrical ground connection can affect the fuel gauge reading.
To fix the issue, you'll need to diagnose the problem. This will likely require a mechanic or someone with automotive experience to check the fuel level sensor, wiring, and gauge. Simply "resetting" something isn't going to solve a hardware problem.