If you failed to appear in court on your scheduled court date the judge likely issued a bench warrant for your arrest. The judge would have set a bail amount when he ordered the warrant issued. What this means is that you are now subject to being arrested by any law enforcement agency for any reason. Often the police will go to your home or place of work to arrest you. When you are arrested you will have to post the bail amount set on your case and you will remain in jail until you do so.
In addition, the court is required by law to notify the Department of Motor Vehicles and your driving privilege will be suspended indefinitely until you appear in court on the warrant.