Question about 2004 Ford Focus

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Is there a way to program a new key with only one existing key?

I have one working key for my Focus. I have purchased a replacement PATS key but need a way to program it. Is there a way around the need to take it to a dealer to program the new key?

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How do you program a new key for a 2004 ford focus

Posted on Jan 04, 2010

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Hope this helps

http://www.fordf150.net/howto/patskey.php

Posted on Oct 20, 2008

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Can you program a pats key without an existing key on a 2002 ford excursion


try contacting the ford company and ask them, they may be able to help you

Mar 21, 2016 | Ford Cars & Trucks

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How can i find the Location of the BCM on a 2006 Ford Focus?


it needs to have a matching program for the ecm and the immobiliser. A new key cut to the existing barrel/lock and programmed to the vehicle ecm will solve the problem. Even if you get a new barrel and key you will still have to have it reprogrammed to the ecm and immobiliser system

Dec 12, 2014 | 2006 Ford Focus

1 Answer

2003 Ford Focus PATS light not blinking and car won't start


I don't believe there is a problem either.
Under normal conditions the security light should come on then go off if the correct key is being used.
The problem could be the key switch or the neutral safety switch if it is an automatic trans. There are other possible causes.

Apr 03, 2013 | 2003 Ford Focus

1 Answer

I replaced the key and tumblers on my 2003 ford focus. How do I reset security


In order to learn a new PATS system key you will need to have two original keys. You would insert one of the existing keys into the ignition. turn it on and off. you would insert the second existing key into the ignition and turn it on for at least 1 second and turn it off. Insert the new key, within 20 seconds, turn the ignition on for a second and turn the ignition off. the security light will will either flash or stay on for a couple of seconds (i don't remember specifically) to let you know you added the new key successfully.

Since it sounds like you are no longer able to do this you have two options.

1. you can pull the new lock cylinder out and have it coded to your original key and then use the original key(s) to start the vehicle.

2. you will have to have the vehicle towed to the ford dealer and have them program the new master key.

let me know if you have any questions and thank you for using fixya.con!

Feb 22, 2012 | 2003 Ford Focus

1 Answer

My f-450 2008 diesel has a continued problem.. signal work with out key and flasher unit stay on continuous while key off.


PATS Transceiver
The PATS transceiver is located under the steering column shroud and communicates with the PATS ignition key. During each vehicle start sequence, the PATS transceiver reads the PATS ignition key identification code and sends data to the IC. The IC validates the code, and if it is the correct code, will send a message to the PCM to ground the starter relay solenoid coil and to also allow the fuel injectors to operate.
PATS Operation
NOTE: If the IC or the PCM is being replaced (or both), the parameters must be reset in both modules or the vehicle will experience a PATS no-start. This will occur even if the vehicle is not equipped with PATS. PATS vehicles and non-PATS vehicles have parameters in the IC and the PCM and they must be reset whenever either (or both) module(s) is (are) replaced. Refer to Passive Anti-Theft System (PATS) Parameter Reset in this section.
The PATS function is controlled by the IC. When the PATS key is turned to the ON or START position, the IC initiates the key interrogation sequence by sending a voltage signal to the PATS transceiver. The transceiver then uses its antenna to bounce a signal off the transponder in the PATS key. This process "reads" the PATS key identification code and sends the key identification code back to the IC, which interprets it and determines if it matches one of the stored key codes. If it does match one of the stored key codes, the IC will send a message to the PCM to ground the starter relay solenoid coil and to also allow the fuel injectors to operate. If it does not match one of the stored key codes, or it is only a partial key read or no key read, the IC will send a message to the PCM to not ground the starter relay solenoid coil and not allow fuel injector operation. The anti-theft indicator in the IC will flash (or may glow steadily) and the IC will store one or more DTCs. All elements of PATS must be functional before the vehicle will start. If any of the components are not working correctly, the vehicle will not start. If the IC must be replaced for any reason (PATS concerns or IC concerns), the PATS keys must also be programmed into the new IC. Refer to Key Programming Using Diagnostic Equipment in this section.
PATS disables the vehicle from starting if there is:
  • a damaged PATS key.
  • a non-programmed PATS key.
  • a non-PATS key (key has no electronics).
  • damaged wiring.
  • a damaged transceiver.
  • a damaged IC.
  • failed parameters between the IC and the PCM.
PATS Parameter Identification (PIDs)
Monitoring the PATS PIDs in the IC can be very useful in determining which diagnostic steps to follow. Viewing the MASTERKEY (verifies if the key is programmed) PID (with both keys) will determine if the key is a programmed key and will also prove out the transceiver, circuitry and the IC. A master key is any key that is programmed into the IC (the MASTERKEY PID must display PRESNT). If the MASTERKEY PID reads NOTPREST, it may mean the key in the ignition lock cylinder is not programmed, is not a PATS key, is damaged or the transceiver, circuitry or IC may be at fault.
Viewing the MIN_KEY (minimum number of keys) PID (this PID does not change) indicates the minimum number of keys that must be programmed into the IC. There must be at least 2 keys programmed into the IC in this type of PATS before the vehicle will start.
Viewing the N_KEYCODE (number of keys programmed) PID will determines if the minimum number of keys have been programmed into the IC. If the N_KEYCODE PID reads 0 or 1, additional key(s) will need to be programmed into the IC in order to meet the minimum of 2 keys. If the N_KEYCODE PID reads 0 or 1, and the MASTERKEY PID reads NOTPREST, that particular key must be programmed into the IC. If the N_KEYCODE PID reads 1, and the MASTERKEY PID reads PRESNT, that particular key is already programmed into the IC.
If the IC was replaced, the parameters in the IC, then the parameters in the PCM will need to be reset. When the parameters in the IC are reset, that clears (erases) the PCM ID from the IC. A parameter reset of the PCM will send a PCM ID to the IC that is necessary for the system to operate. Make sure to make 3-5 attempts to start the vehicle for 3-5 seconds each before attempting more procedures. The extra key cycles are necessary for the PCM ID to be sent (by the PCM) and then stored by the IC. If only a PCM parameter reset occurs, the IC may encounter 2 PCM IDs (the original one and the new one) and may cause a PATS-related no-start. If a PCM parameter reset occurs first, then the IC parameter reset occurs, there will be no PCM ID stored in the IC, and a PATS-related no-start may occur. Carry out the IC parameter reset first, then the PCM parameter reset next. If the PCMID PID reads STORED, the IC has a PCM ID stored. If it reads NOTSTRD, a parameter reset of the PCM may resolve this issue. If the PCMID PID reads STORED, the PCMVER (the PCM ID has been verified) PID will read YES.
If the PATSENABL PID reads DISABLE, and the N_KEYCODE PID reads 2 or more and the MASTERKEY PID reads PRESNT, the IC and the PCM will need to have their parameters reset.
If the PATSENABL PID reads DISABLE, and the N_KEYCODE PID reads 1 and the MASTERKEY PID reads PRESNT, or if the N_KEYCODE PID reads 0 and the MASTERKEY PID reads NOTPRESNT, a minimum of 2 keys will need to be programmed into the IC. Refer to Key Programming Using Diagnostic Equipment in this section.
If the MASTERKEY continues to read NOTPRESNT after programming, this may indicate a defective key. The SPAREKEY (spare key) PID is defaulted to ENABLE. With the SPAREKEY PID displaying ENABLE, the IC will accept more than 2 keys (up to a maximum of 8) being programmed into the IC. Refer to Key Programming Using Two Programmed Keys in this section. It can be toggled to DISABL if the customer does not want any more than 2 keys programmed into the IC. Refer to Key Programming Switch State Control in this section. This switch state control does not affect the Key Programming Using Diagnostic Equipment procedure.
In summary for the IC PATS PIDs and their correct state in order for the vehicle to start:
  • N_KEYCODE must read 2 or more
  • MASTERKEY must read PRESNT
  • PCMID must read STORED
  • PATSENABL must read ENABLE
  • PCMVER must read YES

Aug 24, 2011 | 2008 Ford F 450 Super Duty

2 Answers

Seek your advice for ford winstar model2002 lost the make duplicate key but not acepting please advice


Hi, I found this on a ford forum for you, procedure to program a new key to your car's anti theft system computer.:
Please rate this answer if helpful! Thanks, Mike
How to program a replacement PATS key patskey_small.jpg

Please keep in mind....
This and other how-to articles are provided for informational purposes only. Perform the procedures at your own risk. FordF150.net is not responsible for any damage that may occur as a result of performing procedures outlined in any article. Please be sure to read and understand the entire article before doing this.

These instructions will save you a lot of money. The dealer wants at least $50 just to do this simple procedure.....

To start off, I'll explain a bit about what a PATS key is, what it does, and why this might concern you.

PATS is an acronym that stands for Passive Anti-Theft System (Ford also calls this SecuriLock). It is also called a transponder key. It is a security feature found on most (if not all) new Ford products, and what it does is disable your vehicle's starter unless your specially programmed key is used to start the vehicle. There is a computer chip inside of the key, and without that you will NOT be able to start the vehicle -- even if you have a regular (non-PATS) key with the correct cuts, it will not work.

For convenience, I'm also including a list of other vehicles that these instructions apply:

Ford Contour '98-up
F-150 '98-up
Ford Crown Victoria '97-up
Ford Escort 99-up
Ford Excursion '00-up
Ford Expedition '98-up
Ford Explorer '98-up
Ford Focus '00-up
Ford Mustang '96-up
Ford Ranger '98-up
Ford Taurus '96-up

Ford Windstar '98-up
Lincoln Continental '98-up
Lincoln LS '00-up
Lincoln Mark VIII '98-up
Lincoln Navigator '98-up
Lincoln Town Car '98-up
Mercury Grand Marquis '97-up
Mercury Mountaineer '98-up
Mercury Mystique '98-up
Mercury Sable '96-up

NOTE: These instructions may apply to more or less vehicles than those listed above. I cannot confirm that these procedures work for every year and model listed. See your dealer if to confirm this.
On-Board Programming Method "B"

for Ford keys (1996 -early 1998 Ford, Lincoln, Mercury)
If you want to initiate a new master key....

1. Insert new key into ignition cylinder and turn it to the ON (RUN) position. The security light on the dash will flash for fifteen minutes.

2. When the security light stops flashing, you have FIVE minutes to start the next step. Turn the ignition cylinder OFF and then back to the ON (RUN) position. The security light on the dash will flash for fifteen more minutes.

3. When the security light stops flashing, you have FIVE minutes to start the next step. Turn the ignition cylinder to OFF and then back ON (RUN) position. The dash will flash for fifteen more minutes.

4. After the security light stops flashing the third time, the new key has been programmed into the vehicles computer and will operate the car. It has replaced ALL the previous electronic key codes and is the ONLY key programmed into the vehicles computer.
If you want to add a key....

1. Insert an existing key into the ignition cylinder.

2. Turn the ignition cylinder to ON (RUN) and back to OFF.

3. Remove the existing key and, within 15 seconds, insert the new key and turn it to ON (RUN).

4. The security light will light up for two seconds to indicate success in programming the key into the vehicle.

5. Don't attempt to start the vehicle with any key for at least 1 minute.

Please rate this answer if it is helpful! Thanks, Mike

Jun 14, 2011 | 1999 Ford Windstar

1 Answer

Just replaced lock cylinder in my 2002 ford focus and now it wont start what do i do?


You changed the cylinder, did it come with new keys or did you have the new cylinder rekeyed to fit you old keys? It has a PATS antitheft system. You need to use your old keys or have the security system reprogrammed.

Oct 12, 2010 | 2001 Ford Focus

2 Answers

Will inserting the wrong key in the ignition of a 2003 focus screew up the PATS? I replaced the key cylinder that had locked up. I inserted the wrong key (non PATS) The one for the doors. It turned the...


inserting the wrong key wont damage the pats its just a no start condition.using a non pats key wont solve the problem either.when using unprogramed key the pcm will disable the ignition system and the starter

Jan 14, 2010 | 2000 Ford Focus

1 Answer

Had a key made at Home Depot and it works on the doors but not on the ignition. Is it a PATS key that I need?


You might already have a PATS key, but it will need to be synchronized/programmed for your vehicle.

Good instructions here, use "add a key" in method "C", near the bottom.
http://www.fordf150.net/howto/patskey.php

Dec 19, 2009 | 2004 Ford Focus

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

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