Question about Ford F-150

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My 2002 ford 150 has "theft" signal flashing & will not let me start engine..I have tried both spare & regular key...cannot find a reset button anywhere. How do I get my vehicle started?

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  • midby May 23, 2009

    It's a bit dark to be working on it tonight. Will try your suggestion first thing tomorrow. Thanks.

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Pull the battery cables for 12 minutes and reconnect the posts. after the 12 minute reset, put the original key in the ignition and turn the switch to the on position. wait for three seconds, then start.

Posted on May 23, 2009

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Posted on Jan 02, 2017

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My 2002 Ford F-150 will crank but not start in theft mode no data link connection to pcm however computer has power to it but no power to pats system how do I fix?


Shut the truck then put the key in the door turn it right for ten seconds and hold it after ten seconds turn it left an hold ten seconds then unlock the truck and try to start agin this will reset the theft system

Apr 23, 2016 | 2002 Ford F-150

2 Answers

I have a 98 ford expodtion lost the key and tor into the ignion plz help.


OK. So you lost your key. People do that all the time. That's what spare keys are for. But you apparently don't have a spare. So you tore into the ignition to try to get the vehicle to start. Now you are realizing that the vehicle has safeguards to prevent just that from happening (we call what you tried to do "hot wiring"). The reason that the car is designed that way is to prevent theft and therefore reduce insurance costs. Money saved in order to have a spare key.

So you made some stup1d mistakes.

  1. You lost your key.
  2. You didn't have a spare key.
  3. You destroyed your vehicles ignition system
And now you want help. Unfortunately, you can't fix stup1d.
Call the dealer, get it towed, have it repaired, get a new key AND a spare. And after you spend that $1000.00, consider it a lesson learned.

Oct 31, 2015 | Ford Cars & Trucks

1 Answer

Pickup starts but won't stay running.


is the theft light flashing?? try your spare key , the chip in the key can get damaged and not talk to the computor. you may need dealer for reprogram of new key

Mar 07, 2015 | 2006 Ford F-150

3 Answers

2004 ford truck f 150 4.2 theft light flashing wont start how to fix


Battery Dead or worn out?

Get a fresh or fully charged battery in there,
then turn the key on & off 3 or 4 times & try it

Sep 30, 2014 | Cars & Trucks

1 Answer

Theft light expedition


check with a spare key. it could be the chip in the key has either gone out or needs a battery

Mar 18, 2014 | 2002 Ford Expedition

1 Answer

How to reset anti theft on 2002 f -150 to start


Not certain this will work on your truck, but many will reset by turning key to "on" but don't try to start, leave on for about 15 minutes, turn off, then try to start.

Mar 16, 2013 | 2002 Ford F150 Regular Cab

2 Answers

The Theft light flashes when trying to start. Engine won't start


Could be juat a bad key. Do you have a spare? Will probaly need to go to dealer.

Jan 15, 2011 | 2000 Ford Windstar

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 1998 ford expedition won t start and the theft


the light blinks when the system is armed. Normal.

Your key has to be able to communicate with the receiver in the ignition area. Does your other key work ok?

Anti-Theft The passive anti-theft system (PATS) uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user.
  • During each vehicle start sequence, the ignition key identification code is requested by the PATS module.
  • If the key's ID code has been programmed into the system, the vehicle powertrain control module (PCM) (12A650) is allowed to operate; this allows the vehicle to start.
  • If the key's ID code is not programmed into the PATS module, or if no encoded key is detected, then the vehicle PCM is disabled.
The PATS module, located under the driver side instrument panel, communicates the state of the security system to the PCM via the module communications network. The PCM, based on the communications from the PATS module, will determine if the vehicle's engine will be enabled to start. If the PCM prevents the vehicle from starting because of PATS, the PCM will store a DTC in memory.
-------------------------------------------------------------------------
The anti-theft vehicle protection system utilizes the THEFT indicator, located in the instrument cluster (10849), when the ignition switch is turned to the RUN/START position. The indicator provides system prove out and operating status to the customer or technician.
Each PATS ignition key holds electronics that give each key a unique ID code.
The PATS will activate the indicator signal when the ignition switch is turned to the RUN/START position. The THEFT indicator will turn ON for two seconds, then turn OFF.
If the THEFT indicator flashes for one minute or more, this indicates that there was no key code received.
When the vehicle ignition switch is placed in either RUN or START, the PATS module requests the ignition key ID code. The PATS module requests the ignition key ID code by supplying power, ground, and the carrier signal to the transceiver to energize the ignition key. After the energize period, the key transmits its ID code to the transceiver module, which sends it to the PATS module.
The PATS module then compares the received KEY ID code to those stored in memory (16 maximum). If the ID matches, the PATS module sends an enable signal to the PCM over the module communication network.
The passive vehicle protection system utilizes the engine management capabilities of the PCM to enable or disable the vehicle engine. The module communication network is used to send and receive messages to and from the PCM.
Within one second after engine start, the PCM must receive an enable signal from the PATS module through the module communication network or the engine is disabled before the vehicle can be moved.
If the PATS module recognizes a stored ignition key code but there is a module communication network concern preventing the PCM from recognizing the start enable signal from the PATS module, the vehicle engine will be disabled. If this happens, the PATS module will flash the THEFT indicator for one minute, then flash diagnostic trouble code 16 ten times to indicate there is a problem with the module communication network circuits or the PCM is not responding properly.
The passive vehicle protection system will disable the vehicle from starting if there is a:
  • Damaged encoded key.
  • Unprogrammed key.
  • Non-encoded key (key has no electronics).
  • Wiring concern.
  • Transceiver concern.
  • Control module concern.
  • Module communications network concern.
  • ----------------------------------------------------------
Key Programming —Spare Key NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.
NOTE: Performing this procedure does not erase existing programmed keys.
  1. Insert the programmed key in the ignition. Turn to RUN.
  1. THEFT indicator proves out after two seconds.
  1. Remove the programmed key.
  1. Within 15 seconds, insert the new key in the ignition and turn to RUN.
  1. THEFT indicator proves out after two seconds.
  1. The extra key is now programmed.
------------------------------------------------------------------------------------
Key Programming —New Key (Without Diagnostic Tool) NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.
  1. Insert the nonprogrammed key in the ignition and turn to RUN.
  1. THEFT indicator flashes rapidly.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.
  1. After 15 minutes of flashing, the THEFT indicator will stop flashing.
  1. All originally programmed keys are now erased, and only the key in the ignition is programmed.
  1. Additional keys may be programmed; refer to Key Programming—Spare Key .
---------------------------------------------------------------------------------------

Jun 17, 2009 | 1998 Ford Expedition

2 Answers

Ford f-150 will not start


I have a 1991 Ford f-150 , I change the battery and started haveing trouble, the engine rotates but will not start. I put a litter gasoline on the throttle body and will start. Ish Gonzales

Dec 29, 2008 | 2002 Ford F150 Regular Cab

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