If your key fob stops working, it can be frustrating, especially for vehicles like Ford, Jeep or Dodge that use keyless entry systems. The first thing to check is the battery. A weak or dead battery is often the main reason. If changing the battery does not help, the problem might be with the inside parts of the fob, signal issues or a connection problem with your car. You might notice the fob is slow to respond or not working at all. These are signs something is wrong. Trying to fix it yourself could make things worse. It is better to call a professional automotive locksmith. They can find the problem, reprogram or replace the fob and help you quickly. Whether you drive a Ford F150, Jeep Wrangler or Dodge Charger, getting help on time will keep your keyless entry system working safely and properly.