Given some close calls with my PT lately, I picked up a couple spare PCMs for my 03 SSEi. If install the spare PCMs to do the Security Relearn and swap back in my original PCM, will I have to do the relearn again on my original PCM?

I guess my real question is once a PCM goes through the relearn for a particular car, does it maintain that password regardless if it's in the car or not?

TIA