Why does anti theft light stay on after alarm set car wont start?

If the anti-theft light stays on after the alarm is set, it typically indicates that the car's security system has been triggered or is malfunctioning. This can prevent the vehicle from starting as a safety measure to deter theft. Common causes include a faulty key fob, a problem with the ignition system, or an issue with the vehicle's anti-theft module. It's advisable to consult the owner's manual or a professional mechanic to diagnose and resolve the issue.