Question about Ford Taurus

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I lost my key and the ford dealership by my house sad i need to reprogram a chip but the car is a 1999 tuaruse and its to old to pull up what can i do

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  • Anonymous Dec 15, 2008

    What if you only have one working key? I purchased the vehicle used and there was only one key that came with it


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Here is the factory procedure to program a new key(s), I recomment only factory keys, you need to use the working key to do the procedure;
1. Insert a previously programmed coded key into the ignition.

2. Turn the ignition from the 3 (OFF) position to the 4 (ON) position. Keep the ignition in the 4(ON) position for at least one second, but no more than 10 seconds.

3. Turn the ignition to the 3 (OFF) position, and remove the coded key
from the ignition.

4. Within ten seconds of removing the previously programmed coded key, insert the other previously programmed coded key into the ignition.

5. Turn the ignition from the 3 (OFF) position to the 4 (ON) position. Keep the ignition in the 4 (ON) position for at least one second but not more than 10 seconds.

6. Turn the ignition to the 3 (OFF) position, and remove the second key from the ignition.

7. Within twenty seconds of removing the previously programmed coded key, insert the unprogrammed key (new/valet key) into the ignition.

8. Turn the ignition from the 3 (OFF) position to the 4 (ON) position. Keep the ignition in the 4 (ON) position for at least one second.

9. Your new unprogrammed key is now programmed. If the key has been successfully programmed it will start the vehicle’s engine and the theft indicator light will illuminate for three seconds and
then go out. If the key was not successfully programmed, it will not start your vehicle’s engine and the theft indicator light will flash on and off rapidly. If failure repeats, bring your vehicle to your dealer to have the
new key(s) programmed.

To program additional new unprogrammed key(s), repeat this procedure
from step 1 for each additional key

Posted on Jul 25, 2008

  • darren murphy
    darren murphy Dec 05, 2013

    do i need 2 promgrammed keys to programme my new key as you stated??/


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Seems like what they did was had the car anti theft system reprogrammed to the new key only. Your car has a transponder anti theft system on it. What this does is your old key has a chip in it that when you put it in the ignition it emits a certain frequency picked up by the car. when the frequency matches the car, the car starts, when it doesnt your car will not start or not stay running very long such as your case. I would get ahold of the dealership and have your keys reprogrammed (unless your ok with using the new one the towing company made). Good luck to you and thanks for using fixya!



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