I just want to say thanks to the forum for info about the actuary. Three weeks after paying cash for a 12 year old Prius (2005) my entire dash lit up like a Christmas tree. I was able to tell the dealership that I was under an extended warranty for the break actuary. They made the repair and gave me a rental for 1 week all at no charge. Unfortunately, I'm back to the forums because all my lights have gone off again. I'm hoping it is a bad replacement part...time will tell!This could be your Brake Actuator going out. Take it into the deal IMMEDIATELY. My brakes were making a BARKING noise, and I could hear a motor or something cycling on and off every 5 seconds or so. Then all those lights went on!
Turns out that in my 06 that part is under warranty until Dec 31, 2017!! Yeah you read that right, NEXT December. It's a known bad part.
When they look it up, have them look up the ORIGINAL warranty, not the secondary warranty. It's a $2300 repair, you don't want to have to fork that over if you don't need to.
If your actuator goes out, you will lose your brakes (it could happen while you're driving).
Brake, (!), ABS, VSC Lights Warning Lights Popped On
Almost home when 4 warning lights (Brake, (!), ABS, VSC) came on Friday after driving about 45 minutes from work (around 13-15 miles). 2006 Prius with 133K miles. Brakes working. Found this forum and took car to garage next day. 12 volt battery replaced (garage owner said it was a Toyota brand, could have been the original). No problems driving until today, same symptoms, lights came on again while driving home from work, this time farther from home. If it's not the 12v battery, what else could it be? Will be taking it back to the garage first thing in the morning.
Its the brake actuator. Very expensive part. Find used part. Mechanic told me safe to drive until it starts beeping
I apologize for arriving so late to the party but hopefully this will help future people like me. I had the same issue, just replaced the 12 volt battery didn't fix that issue, looked into trying to clean sensors, freekin out thinking it might be the brake actuator ($4500.00 part). Read a thread somewhere about gas cap, thought that's the stupidest thing I've ever heard, but tried it anyway, PROBLEM SOLVED!!! how the gas cap being defective messes with the breaks and traction control I have no clue but that stopped the arey of random break warning lights. Strangly yet still my check engine light never came on just break and traction lights, (I say strangly because your check engine light is emissions).
I had the same indications and it was the traction battery. Replaced it under warranty and all is good.