Michel Trudel, the owner of the studio, told TMZ.com he changed the locks this week because Diesel's production company, One Race Films, was behind on its obligations.
TMZ said there appeared to be a broad-based cash-flow problem at One Race. Sources told the Web site that crew members had not been paid in more than two weeks.
One Race had no immediate comment. Trudel, however, added he expected the situation to be resolved soon and would allow production to resume.