Warrants do not expire. Therefore, yours will remain active until you go back to the court that issued it and appear before a judge. At that point, you will need to handle not only the warrant but also the underlying charge. At this point you should contact a local criminal law attorney for further advice. Just know that until you do, the warrant will show up in an employment backgroud check and you can be arrested if you are stopped by the police for something such as speeding, etc.