If you don't have a gas cap, try inserting the funnel to open and close the flapper door many times to clear the debris away from the filler neck. It's a common problem.
You shouldn't just throw the solenoid at it. There are two of them one by the engine called the purge solenoid, and one by the tank called the vent solenoid. Try to clean the filler first, then clear the code. If it comes back on then you need to start checking the solenoids.