Hi,
It shouldn't have lost memory, but since it is a valet key, anything is possible.
As far as reprogramming is concerned, this requires a scan tool that can communicate with the PCM and has an immobilizer program card. That is a dealer item. However, you may find a locksmith that can do it as well.
Also, I'm not sure you can rewrite just a valet key. Whatever is registered when the rewrite is done is the only thing that will work. You may want to consider a spare key/fob.
I attached the directions below. Take a look through them and let me know if you have questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
SPONSORED LINKS
Monday, April 11th, 2022 AT 8:53 PM