I have an '09 Subaru Impreza and recently encountered a problem where the fuel gauge will read half full, or full (depending on how much gas I actually have in the car), but the gauge will drop to empty suddenly when driving, stay like that for a few minutes, and then go back up to the correct reading.

 

This will happen on and off every 5-10 minutes while driving, but the check engine light has not come on. Would this be a sensor issue, fuel pump issue, or something else? Hopefully someone else here has encountered this issue because Google only shows people the same issue but with a check engine light on or the gauge never going back up.

 

Thanks in advance!

This sounds like a wiring problem, most likely a bad grounding wire. The check engine light will not come on with a problem like this. Check for any rusty wire connection from the gas tank going forward. Easiest to do this, with your car up on a lift. Not likely this is a sensor or fuel pump issue, simply a wire going to ground that has a bad connection.