Question about 2002 Ford F150 Regular Cab

2 Answers

Theft light on-- engine wont start

2002 f-150. usually happens daily, the engine will turn over but will not start. when this happens the theft light on the dash is blinking and i notice the digital mileage has dashes across it (----------). I take the key out and try again and it usually starts and runs great! it has died on me once. any help would be greatly appreciated!! Is this something i can fix myself ?

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  • johnnyyarbro Dec 12, 2008

    thank you very much.

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2 Answers

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  • Expert
  • 148 Answers

Disconnect the battery and leave for a few hours/overnight. Hopefully, the system will discharge itself enough to reset. 

Posted on Dec 12, 2008

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  • Ford Master
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There is a sensor that reads a code on the key, that sensor is in the ignition lock cylinder, it may be defective, also the problem can be the key, in any event u will need to have the key programmed if u replace the key or the ignition lock cylinder.
My experience? 20 years as a Ford dealer Master Ford electronics technician.

Posted on Dec 12, 2008

  • yadayada
    yadayada Dec 12, 2008

    here are the key programming instructions from the owners man.



    1. Insert the first previously

    programmed coded key into the

    ignition and turn the ignition from 1

    (OFF) to 3 (ON) (maintain ignition

    in 3 (ON) for at least one second,

    but no more than ten seconds).

    2. Turn ignition to 1 (OFF) then 2

    (ACC) and remove the first coded

    key
    from the ignition.

    3. Within ten seconds of removing

    the first coded key, insert the second previously programmed coded

    key
    into the ignition and turn the ignition from 1 (OFF) to 3 (ON)

    (maintain ignition in 3 (ON) for at least one second but no more than

    ten seconds).

    4. Turn the ignition to 1 (OFF) then 2 (ACC) and remove the second

    coded key
    from the ignition.

    5. Within 10 seconds of removing the second coded key, insert the new

    unprogrammed key (new key/valet key) into the ignition and turn the

    ignition from 1 (OFF) to 3 (ON) (maintain ignition in 3 (ON) for at least

    one second, but no more than ten seconds). This step will program your

    new key to a coded key.

    6. To program additional new unprogrammed key(s), repeat this

    procedure from step 1.

    If successful, the new coded key(s) will start the vehicle’s engine and the

    theft indicator will illuminate for three seconds and then go out.

    If not successful, the new coded key(s) will not start the vehicle’s engine

    and the theft indicator will flash on and off and you may repeat steps 1

    through 5. If failure repeats, bring your vehicle to your dealership to

    have the new spare key(s) programmed.

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