How many fobs?

You can have a total of 5 keyfobs registered. If this is a used car, it's possible that a previous owner registered additional keys that you don't have. The "delete" function on the programmer/scantool can be used to reset the registration to just one key. Then you can add the other one (+ the new one).

If you're adding a used keyfob that was previously registered on another car, it will be necessary to do a "seed reset". Then add the used key first, then the two keys that you already have.

 

How did you buy a Prius v in 2004? They weren't even made then. I think you have the wrong forum.

Tom

 

I'm not familiar with the software that locksmiths use. But the mechanic's tool, Techstream, has the functions "Erasure", "Reset", and "Registration" for SKS (silver logo) keyfobs.

"Registration" is used to add a keyfob to the system. But if the keyfob has been previously registered to another car, this doesn't work without doing a reset first.

"Erasure" deletes all keyfobs except the one currently being used. Good for de-registering keyfobs that have gone missing. You do have to re-register the keyfobs that you still have.

"Reset" sets the car back to zero keyfobs. It also enables registration of a used keyfob that would otherwise be rejected. Use of this function requires access to a "seed code" lookup that is restricted to dealers / mechanics / locksmiths who have jumped through some hoops intended to keep out thieves. Part of the security is that the reset process has a 16 minute delay, which is also intended as a hassle for thieves.

Note also that Gen2 (2004-2009) Prius also have a transponder system that is used when the keyfob is inserted into the keyslot. It requires a separate registration process similar to the SKS one described above. Used keyfobs can be registered without having to do a reset.

 

Possibly a lot. Mostly will be from California as I heard they heed my call.