p0449 chevrolet cobalt

Im still getting a P0449 I change the purge valve

Hello to everyone on here. Im new to Cobalts and am not experienced with any GM vehicle Ive been a Ford guy all my life. I have a 2009 Cobalt that i got last month that is throwing a p0449 code. the guy i got it from said he didnt replace the evap canister solenoid which is what the p0449 code...