An immobilizer is a device that is used to prevent a vehicle from being started without the proper key. It is usually built into the ignition system and works by reading a code that is stored on a chip in the key. If the code does not match, the immobilizer will prevent the engine from starting.
There are a few different ways that you can reset an immobilizer. The most common way is to use a special reset tool that is available from the dealership or a locksmith. This tool will usually have a series of wires that need to be connected to the vehicle in the proper order. Once the tool is connected, it will send a signal to the immobilizer that will reset the code.
Another way to reset an immobilizer is to disconnect the battery for a few minutes. This will usually cause the immobilizer to reset itself. However, it is important to note that this method may not work on all vehicles.
If you are having trouble resetting your immobilizer, it is best to consult with a professional. They will be able to diagnose the problem and recommend the best course of action.