Two Cars on One Key?

Yes, it will work. But you need to take both cars to the stealer to have them programmed with the other cars SKS.

 

I don't have two Prii. I was quoted from the Stealer to program a third SKS to my TCH for $50. It would be $100 for two Prii I guess.

 

in high theory, it's possible. but good luck trying to get it to work in practice... or finding a tech who's willing to spend the time trying.

 

This thread has addressed this issue.

https://priuschat.com/forums/audio-electronics/11166-maybe-two-prius-in-family.html

 

According to what I know about SKS...
Each Prius has a SKS central unit (lets call it CU for short) and two fobs. The CU has an unique ID so that the fob cannot unlock another Prius even by a small chance. Each of the two fob was registered to the same CU ID so that it recognizes the CU by the ID (and vice versa). On top of that, there is the code jumping sequence (it recognizes each other by searching and predicting the next 255 codes). If the CU supports multi-channels, then it can track multiple fobs separately indefinitely. Our Prius came with two fobs, therefore, the CU supports no less than 2 channels.
(that is why your spare fob always work even if you haven't used it for 5 years...)

Here comes the question....
I believe our fob can only recognize ONE CU. Therefore, it is not possible to program the fob to recognize TWO Prius... unless both Prius have the same CU ID and you drive the two Prius interchangeably with 255 limits (i.e. you can't keep driving one Prius 255 times, before you drive another one).

That is my understanding. I could be wrong, but it is the best I can offer at this point.

 

Ceric, your post pretty much sums it up. Each Prius can support four fobs, but each fob has only one "channel", if you want to call it that. The rolling code will likely be a problem for any attempt at using one fob with two Prius.

Tom