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The singer told radio show Nights with Alice Cooper that the group get "worried" if they decide when to release a new album.
"There's never any decisions made, that's the thing about AC/DC," he said. "Nobody makes any decisions. That's the wonderful thing about AC/DC, it just happens.
"Nobody says, 'Right, let's get in the studio by January'. That's because immediately we have an enemy - time. And that makes you worried and that makes you in a box and you have to think."
Johnson hinted earlier this year that AC/DC may record a new album and go on tour to celebrate their 40th anniversary in 2013.
He said: "Well if an album comes out - although I don't think I could do two years again, that was brutal, but I'd sure hate to say that's the end of it.
"I think you need a full stop at the end of everything, a sentence, your life, or your car. There has to be a full stop and I don't think we've had one yet."
AC/DC previously insisted that they have no plans to retire and hope to release another album soon.
Watch the video for AC/DC's 'Shoot to Thrill' below:
