To program your car key fob, switch the ignition on using the key, and quickly press the lock button on the fob. Release the button and switch off the ignition. Perform these steps four times in quick succession to put the fob into the programming mode. Then, press lock, release, and switch off the ignition.
Begin programming the car key fob by sitting in the vehicle and closing all the doors securely, including that of the trunk.
Then, insert the key into the ignition and turn it to on. The dashboards lights should come on. Within a span of five seconds, press lock on the fob, hold for a second, and release the button. Now, turn the ignition to off. The dashboard lights should switch off.
When repeating these steps four times, perform each step within five seconds of the previous one. When the key is turned on for the fourth time, the locks should make a clunking noise. This indicates that the fob has entered the programming mode. Keep the key in the on position.
Within a span of five seconds, press lock, hold for a second, and release the button. Next, switch off the ignition, and take the key out. Exit the vehicle, and shut the door. Test to check if the fob functions as required for the car and trunk doors.