no start after wrong fob in key slot

UHS that's the electric key supplier that's selling ex horse dongles that will work and are returnable if not .for about 88 bux you can get all the tools to code grab and redo fobs etc for about 340 you can get self contained tool that can grab clone etc almost any vehicle .

 

Whether you saw it or not, the car can tell the difference between the case that has the right one in it and the case that doesn't.

 

Wasn't it in old case or old case wasn't thrown out yet on seat floor or such do not know generally would need to be in that amplifier you call a slot .

 

When we diagnose things on PriusChat from hundreds of miles away, sometimes we end up attaching not the same amount of certainty to every observation that gets reported. It's not always the case that something reported has been mistaken, but it has happened plenty of times before.

There are certain things we do know:

1. A complete fob has both a circuit board and an RFID chip in the case, and the RFID chip looks like the picture in post #20. This is certain. Many of us on PriusChat know it, and have taken fobs apart and seen it. I've got one right here.
2. You have posted (repeatedly) that you weren't able to spot the RFID chip in either the old or the new case. That doesn't change what we know about the fobs (see 1.), but it changes what we know about how careful an observer you might be.
3. You have posted that the car does start with the old fob case, after you "put the guts back in" (and since you keep saying you've never seen the RFID chip, the only guts you can have meant would be the circuit board). But that fob case works in the car, so the correct RFID chip is in it now, and therefore, if you never moved it, never left.
4. You have posted that the car did start, "that day before", with the new fob case.

True, the explanation would be difficult if we had to take 4. as a confirmed, certain observation. On the other hand, if anything about 4. is perhaps somehow misremembered, the story becomes a very simple one that has been seen on PriusChat many a time before.

 

Watch this video, skip to around the 4 minute mark. He points out the RFID chip. You might need to carefully pry and pick it out without destroying the shell. This is the chip the car immobilizer is married to. You already confirmed the old fob case starts the car. Just move this tiny chip over to the new case and reassemble. It shouldn't need to be glued down.