My question involves criminal law for the state of:California

I am nearing completion of my 5 years of probation, and have completed all terms (jail time, AA course, etc) but one term - a class that takes 18mo to complete. There is no way to complete the class within the next month. From a prior meeting with the judge, my probation has been extended to its max length. Is there a solution without incurring more penalties? What are the consequences?