You are probably referring to the purge solenoid. It is used as part of your vehicles Evap system. The fuel in your fuel tank is constantly giving off vapor. This vapor would cause a huge amount of air pollution if allowed to just go off in to the sky. The evap system allows your engine to burn these vapors in the engine while driving instead of allowing them to get in to the air.
The evap system is very complex and contains many parts. The purge selenoid opens and closes allowing engine vacuum to suck in the fuel vapors. It only operates when the engine computer sees the appropriate conditions are present.
Purge solenoid is on the gas tank along with the evap cannister.
There is NO Oxygen Sensor in the Gas Tank.....
Put gas in it.
by the gas tank middle of vehicle. I believe the purge solenoid valve is located on top of the engine on the passenger side. The fuel tank vent solenoid valve is located by the gas tank.
Inside the Gas Tank. You must purge the Gas Tank, lower it, replace the filter, then reassemble.
it goes on/in the top of the gas tank
Back by the gas tank
bad fuel sensor in the gas tank.
Clogged purge or charcoal canister.
Per the Haynes manual it is on top of the gas tank. You have to lower the gas tank to get to it.
I think it is located in the engine compartment, not on the gas tank.
the sensor is in the gas tank. you probably need to replace the sensor.