Rep Power: 315

Hi, I don't post here much, not too many problems with my 7thgen. I have a quick question which I think I fixed already. I had a P1456 code come up last night, and I saw that my gas cap was loose. It took no effort to get it off. So, I just tigthened it and waited for the "3 clicks" sounds. Anyway, just to put myself at ease, that's what it could've been right? Thanks.

 
Rep Power: 454

if it was loose, more then likely that was the cause.