2014 rzr 1000 error code 651 help

Hi everyone I’m new to the form and the rzr 1000 I just got it used with 42 hours on it and I have a 651 engine code that is getting worse it use to come on like once a ride and then just go off fast then I would have full power again but now it’s at the point where it doesn’t go off I have almost no power. The previous owner says he never had any problems but investigation of the gas tank he ran a wire for the car to car and put a hole in the gas tank and put a rivet in it probably not knowing but there is gas that leaks out from it. Would that cause the code and loss of power or is it something else? Can’t find what the 651 code means… thanks for the help