The immobilizer warning light on your Ford Transit stays on when you turn on the ignition in your car. Therefore you can't start your car, and it becomes very embarrassing especially in the morning before going to work or going to bring the children to school. So you would like to know what to do for at least avoid calling a convenience store and be able to bring your car to a professional. This is why in this article we will help you understand why the immobilizer warning light remains fixed on your Ford Transit. Then according to your diagnosis, we will give you advices to be able to try to réparer your concern.

ford-transit-immobilizer-rest-light

Why does the immobilizer warning light stay on on Ford Transit?

What is the immobilizer on Ford Transit for?

The immobilizer on Ford Transit turns out to be a safety mechanism which allows you not to start your car without a authentication of the key.

Do this when you insert the key on the switch or that the card is identified inside the car, this will close the electrical circuit so that the car's battery performance of your car. This will start the immobilizer box here communicate via the transponder coil, and using the transponder of the key. The latter must allow key authentication. When the immobilizer unit fails to communicate with the key, then it will go into security mode Theft. This should cut off the power of the engine so that it is not able to start and the immobilizer warning light will be displayed on the console.

Depending on the year of your Ford Transit, it is possible to have a traditional key or card, but anyway you will have a immobilizer check whenever you want démarrer the vehicle.

Breakdowns caused by the immobilizer on Ford Transit:

When you have a problem with the immobilizer, the warning light may either stay on continuously on the console either flash very quickly. Anyway in general you will also have Hard to start your car. The seer will represented by a solid red circle. There are several reasons for it to turn on after startup. This is why we are going to list you the various possible breakdowns which activate the immobilizer warning light.

Immobilizer warning light on Ford Transit: Neiman or key issue:

The first thing to study is whether the key is still operational. In fact, in the event that she took a shock, it is likely that this is damaged. Thus, we may think that she no longer manages to communicate with the vehicle thanks to the transponder for authentication. Or quite simply that it is discharged.

This is why you must take the test with the second key of your car, in case it works, then you may have identified the origin of your problem. When you do not have the second key, try to to change yourself the battery. When your Ford Transit is equipped with a card, you can also read the tutorial below if you want more information: Ford Transit card no longer works .

Otherwise when you have a lock, it is also possible that the contactor has seized up, however in this case you should have struggling to put the key in the lock. For more information about your contactor concern, we advise you to read the tutorial below: neiman Ford Transit problem

Immobilizer warning light on Ford Transit: Malfunction of transponder coil or immobilizer unit:

Also, it is likely that your car is failing to communicate with the key through the transponder coil. Indeed, as we have explained to you when the authentication is not confirmed, then the immobilizer function will activate to ensure the safety of the vehicle.

Another possibility related to your car, it is possible that the immobilizer box no longer works properly and therefore it does not allow power to the motor although the authentication is validated.

Immobilizer warning light on Ford Transit: Relay, battery or even fuse issue:

As the immobilizer works thanks to the electrical circuit of your car, if something like drums, relay or fuse of centralization is damaged then this can trigger the activation of the immobilizer.

How to fix an ignition immobilizer problem on Ford Transit?

Concern for immobilizer repairable by you on Ford Transit:

If you want to fix a problem with the immobilizer on, we recommend that you start with check the condition of your battery. To do this you will need to equip yourself with a voltmeter. Then connect the + terminal with that of the battery and that - on the terminal - of the battery. When you turn on your car, the voltmeter should display about 13 to 15 volts. If you want change the battery of your Ford Transit, you can read the tutorial below: Ford Transit battery change price.

Then in case the problem does not come from there, check the relays available at the vehicle's fuse box. So take advantage to control the state of the centralization fuse. For these you can read the vehicle maintenance booklet. This will allow you to know the exact location of the relay and fuse intended for the immobilizer within the fuse box located near the battery. When one of them turns out to be grilled then you can buy one of the same caliber and the change on your own. The manipulation is quite simple.

Immobilizer concern requiring professional intervention on Ford Transit:

On the other hand in the case where it is necessary to change the key, the transponder coil or the immobilizer box, we will have to go in your dealer garage with your registration card as well as an identity document, in order to authenticate that the vehicle is yours. It should cost you a hundred euros for a new key.

To finish: an immobilizer problem may be generated by the key, the transponder coil, or even a battery or relay problem.

To go further in the maintenance of your Ford Transit, do not hesitate to consult the other pages on the Ford Transit.