SES code on an 03 eclipse gs

wife got an SES code in her car today. i took it to advance auto and scanned for the code.

P0455
EVAP Emission
Control System
Leak (Large)

the car is cooling off in the garage right now, but until it cools off, i’m trying to find as much info as possible. Any help is appreciated.

check gas cap and make sure its tight

checked the cap… seems to be ok. just disconnected the battery to reset the pcm. i’ll reconnect later and see what happens.

just took it for a test drive after resetting the pcm. seems like the code is gone, but i’m gonna let her drive it around for a few days to make sure it completes the relearn. then i’ll go back to advanced and delete the code. thanks for the help guys

isent it under warntie still

probably under warranty but not warntie

not under warranty anymore. she put 45k on the car (mostly when she moved to MD for last school year)