"Theft" light blinking fast - car still starts

[nytebyte]

When I got in the 02 GT this morning, I immediately noticed that the "Theft" light was blinking very fast. This is before I even put the key in the ignition.

I put the key in and the car started, although it turned over slowly, probably due to the -15 degree weather and the fact that it's still the original battery.

I searched the Internet and couldn't find anything conclusive.

Any ideas why the Theft light would blink fast like that? Could it be because the battery is almost dead?

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[scca_stang]

Could it be because the battery is almost dead?

I think you hit the nail right on the head... my 01 Blazer did the same thing right before I needed to replace the battery both times.

 

[blownstang]

Mine always does that when it is super cold outside. It has been doing that for the last 3 winters. Original battery will be 6 years old in March. Mine starts up fine every morning.

 

[HeavyG]

My theft light on the L has been blinking for almost 3 years now.....replaced a good battery 2 years ago with a new battery and it still persist's....

If your battery was bad it would show.....especially right now in this cold weather...

 

[95mustang_gt]

the reason the theft light would be blinking would be because it does not recognized the key in the ignition.Its part of the Pats system for ford.there is a chip in the key and the when you put the key in the ignition ,the module would read the key and see if its the right key code.for you to be able to start the car you might have a problem with the pats system.