Brake problem with codes.

welcome!

how many miles on her? are the wheel bearings and cv joints okay?

 

I can't view your video without "signing in". But those code descriptions (assuming you got them from a reliable source, like the repair manual) seem pretty specific, especially "fault in hydraulic system right front", which also corresponds to where you heard a noise. (The voltage-low-or-high code calls for a little more legwork ... the culprit probably isn't the battery with one of those, but likely with some wiring connection on the current path, where the voltage may be dropping.)

Those one-line code descriptions are suggestive, but they won't take you all the way to understanding the cause. That entails going to the repair manual, flipping to the page where the troubleshooting tree starts for each of those codes, and making the indicated tests until the tree leads to an identified cause.

Happy hunting!
-Chap

 

C1241 can be that you have bad 12V battery but I would concentrate on the other code and come back to 12V battery later.

C1341:
http://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/21avn/cic13416.pdf

You likely have crooked, warped, or other vice uneven brake disc. This is the only thing that would cause noise and that code.

-Sometimes when some work is done on the car, or even just taking the wheel of and butting it back on, something can go between brake disc and hub. This will cause the disc to be crooked. Then it will slowly wear to be uneven.
-Or disc can be warped by getting it hot and then driving to a puddle.
-Or if wheel nuts are torqued way too tight disk can bend under the pressure.
-Or peace of disc surface can be lost due to rust buildup inside.

 

135 is low for a tranny, but maybe age, maintenance and usage have some part in it.

 

Was this problem ever resolved? I have the same code and a noise at the right front brake. My mechanic said brakes are fine, but indicated it was a problem with the ABS electrical system and could not fix it. I suspect it is the ecu or the 12 volt battery or both.

 

perhaps a wheel bearing or cv joint?

 

The guy got his problem fixed and moved on, hasn’t been here in almost 15 months. Happens a lot around here. You won’t see him again until he has another problem. You would think people would at least have the courtesy to follow up to help others, but the internet isn’t like that with some people.

 

Thanks for the relies. I had the 12V checked yesterday at Autozone and it's producing the right voltage and they said its still good.
Does anyone know where the ECU is located on the Prius or where I can obtain a diagram of the engine parts, etc.?
Codes readings are C1241 and C1300
Thanks
John

 

techinfo.toyota.com

 

Thanks, Purchased one on eBay. Attempting installation today

 

Purchased on Ebay for $50 and works fine now.

 

So you bought a used ECU and that solved the problem you were having?

 

It's just a regular YouTube video, no problems here. Not sure how helpful it is: the main participant in the video just loves to talk, drowns out pretty much all the other sounds, lol.

 

I wonder if it was a different link at first, when I tried? I don't usually have trouble with youtube.