Programing Replacement FOB

With regards to the last part of your question:
When my old prius T spirit (2008) was written off, I kept one of the fobs. I bought another Prius T spirit, same year, and managed to reprogram the fob for the new one with techstream.
You have to get the right inner for the fob. They are not all the same.

 

Theyres a sticker inside remote with codes and a series of numbers I'm pretty sure locksmith with this sticker can get it correct . My guy at all lock and key in Maine USA maybe able to tell you . He does my transponder keys for my Italian bikes . Which are rendered useless if you mess up the key lose the key Don't do several things correct The whole bike becomes unusable and needs $3,000 worth of electric parts made by companies you've never heard of like z a d i just seemingly cheap junk but I guess it's not it's just a pain to work with I know guys that have bike sitting around that will never move again they're strictly for parts or trash this guy was able to duplicate these things without problem with this machine that he has and what have you I don't know how it all works. And don't really care if I don't have a fob in it works by plugging it in the slot good enough I don't ever lock so I'm good.

 

So, my understanding is that a SKS Gen2 Prius requires one FULLY functional fob in order to add a NEW fob -either with chicken dance or Techstream (or other capable scantool).

If you don't have a fully working fob, then you have to use Techstream (or capable scantool) to reset the smart key ecu with a "seed" code. Then new (or AFAIK, the correct used) fobs can be programmed to the car.

You would need the dealer, or a capable locksmith. Some here have their own Techstream and gotten the seed code from a (questionable) site in Europe.

That said, does the little red LED blink on when you press any button on either fob? Any chance the (new) battery is/are no good or in backward? (I've done both)

Posted via the PriusChat mobile app.

 

And the good/no good decision should be made by checking the battery voltage. It seems if the voltage is 2.9 V or less result will be unreliable to flat out will not work. It pays to check the voltage because even though you might have just purchased a 'new' battery does not mean it is good.