2007 Chevrolet Impala check engine light

I have a 2007 chevy impala the engine light keeps coming on the loco auto parts store that checks the cods for free keeps saying that it has something to do with th fuel system I have changed the gas cap,charcoal filter,presser sensor,and the sensor that is behind and to the left of the top motor mount next to the air filter any other ideas?

What is the code? We really can’t help without knowing at least that.

code po455 evap system large leak … not smelling any thing in or around the car trying hard start reboot ie disconnecting battery over night will see what happens…

If you disconnect the battery, do you know how to reboot the anti-theft system so the engine will start?


had not though about that