Justin Bieber was pulled over by the LAPD today -- after cops say he performed an illegal maneuver in his tricked out "Batmobile" ride ... TMZ has learned.
Cops tell TMZ ... Bieber made an "unsafe left turn" at an L.A. intersection.
But fear not Bieberettes ... Justin was let off with a warning after he promised to be more careful in the future.
This ain't the first time Bieber has been stopped by cops while driving the customized Cadillac -- he was pulled over back in October after cutting off a CHP officer. He got a warning that time, too.