Code P0455 and the Gas Cap

[guruerror]

The truck started throwing code P0455 last week after warning me to tighten my gas cap. So I checked the cap, cleared the code...a day or so later same message and same code.

It's come up three times now so I thought I'd throw this question out to the masses: Has anyone gotten this error and actually found that REPLACING the OEM gas cap resolved the issue? Or is the problem more likely to be elsewhere...charcoal canister, purge vent solenoid, etc.

I mean the cap doesn't see a lot of action...screw it off, screw it on once a week and it's protected from the weather behind my fuel door. Plus I just had it checked twice by the emissions testing center last month and it checked out both times. Don't get me wrong, I'd love for a new cap to resolve the issue...seems like a cheap fix; but I just wanna see if anyone else has went down this road.