Disable mykey

I assume you are talking about the theft light is on in the dash and your vehicle does not start? If this is the case then we need to start with scanning for codes so that we can see why the light is on.

Here is a guide that will help with this:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Then as far as disabling it, there isn't a way to disable it without repairing whatever the issue is. There are some companies out there that sell a PCM that doesn't require the system to be operating but you would have to order that and install it. However, that is the only way that I know to disable it but even then I have seen many people not have success with that so the best way to solve this is to repair the vehicle.

Let me know what question s you have. Thanks