Question about 2001 Ford F150 Styleside SuperCrew

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Why is The anti theft light in my 2001ford f150 is flashing but the truck still starts. Ive used both of my keys to start it but it . It goes off when I statt it but starts flashing again after a few seconds after I shut it off. What can be the problem

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 625 Answers

SOURCE: anti-theft won't deactivate

does the luck and won't start come at same time?
actually there is not way to get rid of the antitheft but if you have two keys for htis car try using only one key some time copies just disprogram the system and if you can't do anything i will recomend you to call a mobile locksmith guy they have the machine to reprogram your key and it is so much shiper than towing it to dealer and pay their crazy prices

Posted on Jun 03, 2008

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lobsterman72
  • 91 Answers

SOURCE: 1996 ford explorer anti theft system

Yes I agree it's the 'smart key'. Normally when you buy an explorer new, you will get 3 keys. 1 of the keys is a valet key.
If you were to copy another key that has a smart chip (transponder) in it, the new key won't work until you 'program' the third (new) key. To program it you need the original 2 keys that work.
The only other thing could be that there was a remote start in the vehicle and there could be something wrong with the module that bypasses the transponder. If there is a remote start in the vehicle you might be lucky to some extent if it still works.
If you move the shifter hard and it worked before, like you said, there could also be damage to the wires that goto the key cylinder, the reciever for the transponder in the key. Try having someone hold the key in start and use the tilt wheel, that too will tell you theres damaged wires if it starts.
Unfortunately you probably will have to bring the vehicle to a ford dealer to get additional keys programmed or the damaged part replaced.
It shouldn't cost too, too much. Just be glad you don't have a Saab, replacement key's are $145 Ea!
If your inclined, you can dissassemble the plastic shroud around the steering column and look for damaged wires coming from the black ring around the key down the the connector under the dash.

Posted on Jul 10, 2008

harley9701ha
  • 424 Answers

SOURCE: 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.

Posted on Jan 26, 2009

chuck943
  • 783 Answers

SOURCE: 2000 ford windstar anti theft light flashing vehicle won't start

This means that your key is not being recogonized.Ethier the chip in the key is bad or the patts transciever at the lock cylinder. Do you have a spare key? If not you will have to get 2 new keyss cut and programmed.

Posted on Feb 16, 2009

  • 149 Answers

SOURCE: 2004 Ford Explorer wont start after battery change-anti theft

sounds like aaa might have popped your main fuse. i would call aaa back and tell them your problem. they are responsible.

Posted on Mar 22, 2010

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I changed engine and transmission in my 2001ford Taurus and now it won't crank because the theft light is flashing. Could this be caused by the neutral safety switch being different


anti theft sensor on key or ignition barrel did you change ecu unit because the new engine won't be set up to your old ecu

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I cannot get the Pats system on a 1999 Ford Taurus to reset to learn a new remote fob. What could be the problem.


Ford Passive Anti-theft System (PATS) - KCSS ...

https://kcss-transportation-technology.wikispaces.com/share/.../61579706
The passive anti-theft system (PATS) uses radio frequency identification .... This hasreset instructions when you get to the point where she turns over but won't ... Took the truck to a Ford dealer and they recommended replacing the ... http://www.f150forum.com/f6/1999-f150-4-6-wont-start-anti-theft-light-flashing-129601/Missing: learn

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I have a f150 2000 v8 triton motor, i drove it the other day it started fine, than I went to start it again and it wouldnt start, than it started when i took to garage they said it was fuel pump and


If the anti-theft light is flashing, I would think it is a problem with the key or the anti-theft system. The system would kill the power to the fuel system.

Aug 29, 2012 | 2000 Ford F150 Flareside SuperCab

1 Answer

2003 f150 turns over but wont crank, also theft light blinking fast


Usually means the sensor in the lock cylinder is not reading the code in the key.
If the pass key system does not get the right signal from the key the truck will not start.
You might try taking the key off your ring - put it in the lock and turn the switch on - but don't crank it for at least a minute.
There are procedures to reset the anti-theft online - - if you do a search for resetting anti-theft F150 you can read them.

Jul 26, 2012 | Ford Cars & Trucks

1 Answer

May or maynot crank. Anti-theft light blinking really fast. May take ~10mins or more before it cranks. Correct key in ignition. Ford F150 2001 truck.


Do you have another key to try ?
The flashing theft light during the crank is indicating the key is not programmed to the truck.
When you get the no crank no start, do the cluster pass the power on tests OK ? ( i.e. all the indicators light up, and then go out, oil would still be on with the key in the run position with the engine off ).

Nov 15, 2010 | 2001 Ford F150 Styleside SuperCrew

1 Answer

Anti-theft system will not allow car to start - how do you unlock the anti-theft


if the theft light is was flashing on you, put the key in the ignition and turn all the way until the instrument cluster lights up, just don't start the car. leave it like that for aprox. 10 min. or until light goes out. when that happens, turn of(don't take out keys) and try to start car. hope it works.

Jul 03, 2010 | 1997 Cadillac DeVille

1 Answer

Turn ignition key and motor starts up, next day turn ignition key and motor just turns over and wont start. could it be anti theft problem its a 2002 f150 4 wheel drive with 4.6 liter


This could be caused by either a faulty Crank Shaft Position Sensor or the anti-theft system. Try put key in, turn to ON position for EXACTLY 10 minutes, As SOON as anti-theft light shuts off or stops flashing, then IMMEDIATELY start the engine.

Jan 13, 2010 | 2002 Ford F150 Regular Cab

1 Answer

My 2004 F150 will not start. When I turn the key the anti theft light just flashes. The key has not lost its code. I tried a 2nd key


the key has lost it's code, there is a chip in the key that communicates with the security system that the correct key is in the ignition and that the vehicle is allowed to start.

if you have any other keys on your key ring remove these and try again.
if no start and light still flashes the computer will need reprogrammed to accept the key.
the dealer can do this in like 10 -15 minutes usually.

May 09, 2009 | 2004 Ford F150

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