Question about 1997 Ford Expedition

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Anti-theft The "theft" light flashes continuously. I've tried different keys but no luck. The vehicle will not start if the anti-theft mechanism is activated. Is there a way to get around this or de-activate?

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  • Anonymous Dec 21, 2008

    1998 Ford Expedition

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Hi Mustang Mummy, As Tom has said, you'll be better off asking for a technician to come and recode the anti theft unit. If the battery connection is removed from modern vehicles, they have a tendency of loosing the encodement. Re coding is the only way....It's a problem if you need to go somewhere in a hurry but a lot better than having an empty parking space where your car should be. Regards John

Posted on Dec 11, 2011

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No way around this.the vehicle will not start without proper signal from pats key.if your using the same keys you always use there must be a problem with the passive antitheft system.but if you or someone else have attemped to start the vehicle with a key that is not programed to this vehicle the antitheft will kick in and you might have to have get your vehicle scanned and the keys reprogramed.you could try disconnecting the battery for at least 10 min this will clear the memory,then try to start.if still does not start there is a problem with antitheft.

Posted on Nov 01, 2008

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99 explorer alarm disables. Motor dies


Anti-theft system can keep vehicle from starting , Alarm is for vehicle content theft , open door without key alarm sounds (horns) ! PATS - passive anti theft system PATS enables and disables the engine from starting ,it will not cause the engine to die ! You have some other kind of problem ! If the vehicle engine doesn't turn over an red light on top of dash flashes fast ,then you have anti-theft system problem !
PATS differs from the perimeter anti-theft system in that PATS enables and disables the engine from starting. If equipped, the perimeter anti-theft system protects the perimeter of the vehicle (doors, hood and trunk) and sounds an alarm.

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I replaced immobilizer coil . still getting theft light code 11


Reading Ford Immobiliser Codes PATS - YouTube

? 2:00
https://www.youtube.com/watch?v=0kBZeBbb9PM
Mar 31, 2011 - Uploaded by Ask The Mechanic
How to read Ford Immobiliser codes when your car won't start. PATS (PASSIVE ANTI THEFT SYSTEM) http://www.askthemechanic.co.uk. ... and milage appeared, but red light still flashing 1:6 Found Fordwiki, and Youtube, ... a scanner with Body Control software you would get a code of B10D7 for code 11.Missing: taurus

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Vehicle will not start! Replaced the battery but it will still not turn over. Oil light, battery and engine light come on when initially trying to start.


Is the security light on or flashing when trying to start the vehicle .
Anti-Theft The passive anti-theft system (PATS) consists of the following components:
  • Anti-theft indicator
  • Encoded ignition key(s) (the key contains a transponder)
  • PATS transceiver
  • Powertrain control module (PCM)
PATS will disable the vehicle from starting if there is:
  • a damaged PATS key.
  • an unprogrammed PATS key.
  • a non-encoded key (a conventional key or one that does not have any electronics).
  • damaged wiring.
  • a damaged transceiver.
  • a damaged PCM.
If it is a anti-theft system you will have to take it to the dealer .This system will keep the starter from spinning the engine .

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Anti-thief system cut off power to den gine an won't cut it back on


If you are dealing with the anti theft the anti theft will flash as you are trying to start the vehicle if this is the case then it is the anti theft if not then you are not dealing with a ant theft issue. You can do a 30 minute relearn procedure without a scan tool. here is how Turn ignition on without the engine reunning.attempt to start the vehicle then release the key to ON.(vehicle doest start) Observe the security light.afeter 10 minutes the security light will turn off.Turn off the ignition and wait 5 seconds.do this 3 times for 30 minutes. start the engine with the engine started the vehicle will learn the passlock key.

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I am having toruble with my imobiliser on my fiesta van 1.8td as it wont crank over and the red led light by the clock display flashes as normal with ignition off and as soon as i turn the igniton on the...


you have problem with the anti theft sistem of the vehicle and you wont be able to start your vehicle with that key. you can try to start the vehicle with the other key but if the anti theft light is flashing fast with both keys you will have to send the car to the dealer for service

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Your ignition key has a unique imbedded transponder which engages engine electronics and allows the vehicle to be started. Without the use of your special ignition key, the vehicle will not start.

During each vehicle start, the coded key is read by the anti-theft system. If the key’s ID code matches the code in the anti-theft system, the vehicle is enabled to start.

Anti-theft system
Briefly illuminates when the ignition is turned to the ON position to verify that the passive anti-theft system is operating properly.

Also, its possisble that tou have actovated the fuel pump switch.

CHeck it.

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1 Answer

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if the vehicle starts then stops and the anti-theft light is flahing you may need to re-set the pass-key system to do this you will need to atempt to start the vehicle and when it stalls leave the key in that position and watch the anti-theft light. it should flash on and off for about 5 to 10 minutes. when it stops flahing turn the ignition to off then try to restart your vehicle

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1 Answer

Anti theft system


The chip is in the key. Either the key has lost it's program or the transceiver is not recognising the key. Try another key if you have one.

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1 Answer

On start flashing theft light on 02 windstar


I just had this same thing happen with my Ford Taurus, and it turned out to be a bad key. The repair shop switched back and forth between two different keys we had with us 10 or 12 times, and it always started with the good key, never with the "bad" key. They said if the theft light is flashing quickly, that means the anti-theft system is engaging. If the anti-theft light just lights up, that is normal.

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