Your Hyundai Ioniq doesn’t start anymore and you understand it’s because of your immobilizer but you don’t know particularly how it works or how to find it? We will try to provide you with an answer in this article.
First of all, we will explain what this famous immobilizer is for and just how it works on your Hyundai Ioniq.


Anti-start utility on your Hyundai Ioniq:

This one is as expected used as an anti-theft protection. Indeed, it is programmed in order to start your Hyundai Ioniq exclusively if the key which includes this code is inserted. We remember these movies where thieves adjust a few wires under the dashboard to start the engine, which is impossible with the anti-start system.

Anti-start operation on your Hyundai Ioniq:

To put it simply, we have a transmitter and a receiver that function together to validate the operation and as a result switch on the engine. The immobilizer provides the transmitter, and will consequently issue a code request when the key is inserted in your Hyundai Ioniq. Think of this transmitter as a doorkeeper who would ask for an entry code when someone knocked at the door.
This code request is provided to the key, which subsequently, sends a unique user code, specific to the start system, and assuming this code matches, then the anti-start will allow the engine start.
The operation is very simple. However, when mentionning double safety, we also imply potentially more possibilities of breakdowns or various failures unfortunately.
In the next paragraph, you will find the various breakdowns you could deal with on your Hyundai Ioniq.

Immobilizer failures:

There may be various reasons that prevent your Hyundai Ioniq from starting because of the immobilizer. First of all, incredibly, you’re not using the right key. It may seem trivial but it happens!
If you have the right key, you have two options left:

  • Option n1: The transmitter is involved, so the immobilizer. In this case, it is easy to detect if you have a duplicate key. If, with the two keys of your Hyundai Ioniq, you have the same difficulty, then it is the anti-start that is defective and therefore must be replaced or disabled. Completing this task will cost less than replacing it, but your car will be more exposed to theft and your insurance may not cover you if your car is stolen.
  • Option n2: The difficulty comes from the receiver, the key, which transponder has been damaged. This can be changed for less money by a professional than the anti-start system.

If you speak to your mechanic, he will obviously offer to tow your Hyundai Ioniq and charge a high price for everything, he will not give you the code quite readily. For security reasons alone, it is legally impossible to transmit the code to you. You must send your car.


  • – First try to determine where the failure on your Hyundai Ioniq came from. Then act accordingly. It would be a shame to replace the entire immobilizer system when the key is defective.
  • – Make a estimate at a garage and then consider an replacement at an online professional, which will often be more efficient and less expensive.

If you want more tutorials on the Hyundai Ioniq, go to our Hyundai Ioniq category.