Why is the security light on after you changed ignition keys?

When you replace your ignition key, the security light may come on for a number of reasons. The most common cause is that the new key is not properly programmed. This can happen if the key was not cut correctly, if the key was not programmed correctly, or if the key is damaged.

Another possibility is that the security system itself is malfunctioning. If this is the case, you will need to take your vehicle to a qualified mechanic or auto repair shop to have the system repaired or replaced.

Here are some additional tips for troubleshooting a security light that comes on after you change your ignition key:

* Make sure that the new key is cut correctly. This can be done by comparing the new key to the old key. If the new key is not the same shape as the old key, it will not work properly.

* Make sure that the new key is programmed correctly. This can be done by taking your vehicle to a qualified mechanic or auto repair shop.

* Check the battery in your vehicle. A weak or dead battery can cause the security light to come on.

* Check the fuses in your vehicle. If any of the fuses are blown, it can cause the security light to come on.

If you have tried all of these things and the security light is still on, it is best to take your vehicle to a qualified mechanic or auto repair shop for diagnosis and repair.