Ford Focus Programming Immobilizer | Uk Auto locksmith

by UK Auto Locksmith
5 months ago

How Does a Car Immobilizer Work?

 A transponder chip is located on the interior of the key fob. The transponder chip sends a code to the Ford Focus key programming immobilizer system when you insert the key or have the key fob inside the vehicle (for keyless fobs).

This car is allowed to start if this security code matches the code in the immobilizer system. The vehicle cannot start if there is no key fob or transponder present.

Each time you start the vehicle, the security code is generated at random, and your car key programming is the only provider that can create the correct token for the vehicle.

The good news is that this electronic immobilization system is quite successful at avoiding car theft, and having your key trapped in the ignition is no longer a problem.

Ford F-150’s passive anti-theft technology prohibits someone from starting the vehicle with a key that has been wrongly coded. When you turn off the ignition, the silent anti-theft system activates. However, when the ignition is turned on with a key that has been properly coded, it disarms. Keep in mind that you must never leave a replacement car key in your vehicle.

Ford Focus Won’t Start, What Could Be the Problem?

A Ford Focus is a dependable road companion, but it is a machine made up of hundreds of interrelated elements that, like any other machine, can fail to perform as intended. The most typical causes of a Ford Focus not starting are a dead 12v battery, a dead key fob battery, corrosion on the battery terminals, and other minor issues.

If your Focus has a push start/stop button, a low-key fob battery could cause your vehicle to not start. You can still start your car because the battery is only used to send signals for locking and unlocking. The door no longer locks or unlocks at the touch of a button if the key fob battery is dead.Programming Immobilizer

These doors must, therefore, be manually opened. A passive transponder controls the Ford Focus key programming immobilizer. The transponder in the key is passive, which means it does not require its own power supply.

If your Focus only has a key fob with a start/stop button and no pace to enter a key, try positioning your key fob as close to the start/stop button as possible before starting the vehicle. However, if this doesn’t work, check your vehicle’s operating handbook for the specific location of the key fob, as it varies by model.

Tip: You can start your Focus by pressing the second key. It also removes any other issues with the original key, such as water damage.

If the key programming immobilizer on your vehicle is stuck on, you may have to reboot the anti-theft system to get it to function again. This can be achieved by turning on the car with the keys that came with it, waiting for the antitheft light to turn off, and then repeating the process and starting the car.

How Do I Program My Ford Immobilizer?

On 2010 and newer models, you essentially have to be a car locksmith, have a locksmith license, be bonded, or satisfy all the requirements to program a key. There are numerous legal problems to consider.

To learn how to program a Ford key fob, follow these steps:

  1. Close all of your vehicle’s doors. To unlock the vehicle, open the driver’s door and push the UNLOCK button.
  2. Within 10 seconds, turn the ignition from OFF to RUN eight times. To enter programming mode, finish on RUN the last time.
  3. The door locks should lock and unlock at this moment. Start afresh and spin the key quicker if they don’t lock and unlock.
  4. To begin programming, press any button on your Ford remote within eight seconds. The door locks cycle once more, confirming that keyless entry has been programmed.
  5. Turn the ignition off after you’ve programmed all of your Ford key fobs. To ensure that the programming is complete, the door locks should cycle one last time.

Where Can I Get a Replacement / New Car Key for My Ford?

If you lose your keys and don’t have a spare, you can get a new one from your nearest Ford Dealer.


We hope that this has given you an in-depth understanding of how your Ford Focus key programming immobilizer works and how to replace it. We’re more than happy to answer any questions that you might have. Call us at 02038809904.