Anti theft light is blinking fast

Good morning,

The key has forgot the password for the system.

Ford does not allow anyone to reset that system. They have security measures to protect anyone from playing with it.

You need an IDS program with a security pass.

In your case, you can either have it towed to a dealer or have a locksmith come to you and program it.

Roy

Hi,

At this point, you need a scanner that can read codes related to the immobilizer. This way you can retrieve codes specific to the cause.

I wish I had an easier solution.

Take care,
Joe

Hi,

This could be a normal operation if the light is flashing every two seconds and goes away when you start your vehicle. Security system will also blips the theft indicator every two seconds at ignition "off" to act as a visual theft deterrent. If the vehicle doesn't start try relearning the key with the relearn procedure I attached below. Let us know if you need more info.

Thanks
Joe T.

There are a few scenarios and failure points to this system, the most common being the key itself. There is both a chip and an internal battery that can fail over time just due to age and or physical damage. Here is a job aid that identifies the key style and the specific system that your truck has. You'll have to right click, then enter it to a new tab to view. Hope this helps!

Did you have someone reprogram it yet?

Roy

Sorry to hear that. Let us know what or when you can address the issue so we can help.

Roy

Okay, I would question why they did not find this when you had it there originally.

They charged you for a diagnostic so they should have seen this as part of the diagnostic.

Roy

If the ECM was not replaced, did you have any work done where they put the wrong in?

They stated they disconnected the anti theft module and it starts. I would have them disconnect it and leave it that way until you get the correct ECM and have it programmed.

Roy

Keep me updated.

Roy