Worn out Key, or module is shot. Try key first, and then scan at a dealership. Hopefully key. Cheaper... by hundreds of $$$$.
It blinks to let people know you have an anti theft device on that car. Or at least make them think you do even if it's just for show.
Enable Anti Theft in Ford Taurus 2000 SE
had to replace the battery in my 2002 Mercury Mountaineer but now the theft light is blinking, it is cranking up. How can I stop it?
I believe that when the PATS theft light is blinking RAPIDLY it is because you are trying to start the car with a non-PATS coded key. If it is blinking every couple of seconds SLOWLY, it just means the system is monitoring the ignition.
That depends on when it's blinking. If it's blinking rapidly when you turn the key on, there is a problem in the anti-theft, and the truck probably won't start. If it's blinking every 3 seconds when the key is off, that is a normal condition. It's telling you that the system is armed and ready.
The blinking red light in the dashboard is an indicator that your anti-theft security system is armed and working.
The blinking theft light in your 1998 Mustang typically indicates that the vehicle's anti-theft system is activated or malfunctioning. This light serves as a warning that the system is engaged, which can prevent the car from starting if it detects an unauthorized attempt to start the engine. If the light continues to blink and you're having trouble starting the vehicle, it may be worth checking the key's transponder chip or the anti-theft system for any faults. Consider consulting your owner's manual or a professional mechanic for further diagnosis.
Some have "fake theft" lights. If the light is blinking red near the radio then it is a fake.
It means that the theft computer has detected a malfunction and set a trouble code.
If your theft light keeps blinking while driving, chances are you have accidentally hit the toggle switch underneath the dash. Find the toggle switch that is located near the panel and click off the button.
ask the police
that is normal I have three fords in my driveway including a 99 Windstar and they all do it. ======================================================== Just adding to the answer ( once the doors are locked )