2001 Chrysler Sebring, gas tank is 1/2 full. The gauge just started bouncing from 1/2 a tank to empty and back again.

replace the tank sender unit

Hi. I would have the battery tested. Most any auto parts store will do this for free for you. Like Auto Zone.

The gas gauge sender is malfunctioning. It is inside the gas tank. This is for experienced handymen or a garage to do.

The problem lies in the sending unit in the tank. It could have a wiring problem or the sending unit is bad.

replace the sending unit

most of the time this is simply just the float in the gas tank getting stuck had the same problem in my car. unfortunately you have to access the gas tank to fix, but it is an easy fix. hope this helps any questions let me know.

Possibly yes. however the ground is now if the wiring harness that plugs on top of the fuel tank.

1. Abraded insulation on the fuel gauge sender wire (intermittent short to ground).
2. Bad fuel level sensor.
3. Corroded or broken connector in the fuel gauge sender circuit.
   

Sounds like the sending unit is bad in the tank.

The sending unit in your tank is bad replace it.

It could be your fuel pump with your car not running right, the gas gauge thing i have no clue maybe the sensor inside the tank is messed up. or it could just be your fuel filter not doing its job. Htere are a few things it could be I would say Fuel Filter, Pump and maybe a vacume (spelling) problem, I would need to be there and hear it running or drive it to really figure out what it is