All Ford Focus models are equipped with SecuriLock, which is Ford’s passive anti-theft system. Each car is sold with two electronic keys (three if your car has the valet feature) that are specially coded to work with the vehicle. The car will not start without using the proper coded key, partly to deter car thieves. However, sometimes the system engages when the rightful owner tries to start the car. If this happens, there are a few things you should troubleshoot before calling a dealer for repairs.
Step 1: Check the key that you are using to make sure that it is the right one for the car. This may sound basic, but if you own multiple cars with different smart keys, you could easily have grabbed the wrong one.
Step 2: Lock your car and activate the SecuriLock system by pressing the “Lock” button twice on your key fob. The horn will sound, confirming system activation.