My check engine light came on. I took it to get testes and it showed the fuel problem. I fill the car with gas and did not shut off the engine.the machanic reset the sensor and the light went off. i drove the car for a day and the light came on again. Can this be the fuel senor again?

IF THE GAS CAP IS NOT WELL TIGHTING IT WILL THAT SERVICE ENGINE SOON OR IF THERE IS FUEL LEAKING ALONG THE FUEL LINE

When the engine dies the Check eng light is supposed to come on. You need to do a fault code test on the OBD2 engine control module.

Don't let the car run out of gas. Fill the tank and run until the tank is half empty. Again fill the tank.
By driving until you run out of gas, you are letting sediments/dirt collected in the bottom of the tank to enter the engine. Rather they will block the fuel filter. Then gas will not reach the engine.
Clean the gas filter and your car will run fine.
The same advice again. Don't drive until the tank becomes empty.

ok need to test the wiring --connections --and sender if verified bad replace

you dont have a misfire, you have deeper problem with the electrical or fuel sender. Even so someone will need to get the code that is stored from the check engine light,,, to proceed.

Try a new vent tube hose from the fill neck to the tank,sound to me like your tank is not venting.The next time it does this,stop,take off the gas cap for a few minutes and then it should restart,if it doesn't let me know.

The gas fillup should be clue, either the gas cap was not tightened enough or it is defective.

You may have one of the following.

A loose gas cap - remove cap and re-tighten again to see if light goes out (may take a while before light goes out)

A faulty gas cap - replace with a new one (shouldn't have failed yet if your car's only a year old)

A faulty fuel sensor only if your fuel level also shows as low (shouldn't have failed yet if your car's only a year old)

There's a vacuum leak somewhere (this would also trigger a check engine light)

change the fuel filter and dont let the car go below a quarter.add fuel injection cleaner every other filling, use high test every other filling!

I would check your intake gasket. Get your self ome carb cleaner in a spray form/can and perfrom this test. Run the car and spray the carb cleaner on your intake gasket which is right by your injectors. So pretty nuch spray it at the injector rail and listen fot change in idle, If the idle changes, the intake gasket is torn and you are running lean, because of a vaccum leak. Common problem on your model car. Perform test and let me know what you find.