I just finished replacing my alternator brushes and fixing a valve gasket leak and now I am receiving check engine light code P0441. The report came back and states that the most likely solution is to replace EGR Vacuum Solenoid. I saw from reading other discussions with the same code that it could be many different reasons such as replacing the gas cap? Should I go ahead and replace the Solenoid like the report said or should I try something else first?