Traction, brake, and ABS lights on

It is easy to get the trouble codes when these three lights come on, which is how you find out why the brake ECU has put those three lights on. It's approximately useless to base anything on just "had the same 3 lights" because those are the only 3 lights the brake ECU has to alert you to problems with, and it uses them for pretty much all one or two hundred reportable issues.

If you don't have a scan tool, you can still get the trouble codes using nothing more than a short piece of wire, and counting the blinks of the lights. There are a lot of posts here on PriusChat on how to do that.

If you retrieve the trouble codes and the ones you get are about wheel speed sensors, then that would give you a good reason to at those sensors, as robomoto has done here.

If you retrieve the codes and the ones you get are about something else, then you would probably skip fiddling with the wheel sensors so you could spend your time checking out whatever issue is really being reported.

 

Changing a wheel bearing is a pain in the nice person, just buy a knuckle from a different vehicle with lower mile and replace that. Super easy