Brake booster failure: covered by Toyota or not

Its a 2014 Prius . i think its a IV. Its got 143k miles. Only have had it 3 months. Antiskid, brake, and abs light are on and the boost is gone. Pedal has to move about half way, and then the car stops. I see there was a recall started in 2019 to replace booster at no cost to owner. I hear only a toyota dealer will do this replacement in warranty or not. And it will cost $4k plus. Is that right?

 

Yea, so it could be many different faults. I have techstream, have not had time to see what codes are being reported yet. No matter what codes i find, i doubt i would have the ability to deal with it myself. And once it goes to the dealersip, of course they will have to pull codes for themselves and charge 80-100.00 just for that
At least I would have some idea about whether they are honest with me or not.

 

Is it possible that disconnecting 12v battery for a short while might clear codes and redtore function? Like a cold reboot on a pc?

 

Well thats great info, but just what is this code that is saying the brake ecu needs to relearn a procedure? I am between a rock and a hard place. There are two toyota dealerships in my city, and reading the service dept reviews for both, they dont have good ratings and some reviews of service are horror stories. Ive done a lot with cars over many years, but im an avionics system tech....not a toyota hybrid tech.

 

Found my diagnostic laptop but not its power supply. Will be next week before i can check what dtc's are set.

 

Another question. I have only a Bentley manual for Prius thru 2008. Learned a lot from studying that, but need something covering my new 2014.
I think the full service manual a dealership would be either unobtainable or too expensive, for an owner. But Bentley seems better than either Chilton or Haynes. Recommendation?