Death triangle with abs lights

inverter pump?

 

C1241 indicates an abnormal voltage measured at the brake ECU. Despite the temptation to jump from "voltage" to "12 volt battery", one has to remember this code is about voltage reaching the brake ECU, and the troubleshooting instructions give a lot more attention to the wiring and connections in that circuit than to the battery.

C1310 is a code set in the brake ECU when it knows the hybrid-vehicle ECU is reporting some problem. If you are not seeing another code from the HV ECU explaining what that problem is, chances are you are using a code reader that can't read all the codes in a Prius. Arranging for the codes to be read with a laptop running Techstream should reveal the rest of the information you're not seeing, and help lead to a solution.

Here is information on finding the Repair Manual, if you haven't already.

 

Techstream is the OFFICIAL diagnostic and maintenance software made for Toyota/Lexus, and used at Toyota/Lexus dealerships. Bluetooth OBD2 readers and all the various apps for smartphones/tablets are junk: LIMITED code reading ability (can't read ALL codes) and can NOT do any maintenance (bleed brakes, engine compression check, activate CHRS pump, etc). Why waste money on a toy that limits what you can read and can't do maintenance?

"But I don't DIY." Getting the codes read at a Toyota dealership will set you back $100+. The cost of the hacked Techstream from Amazon will pay for itself.

Get mini VCI w/ Techstream from Amazon ($18+). Doesn't matter who you buy from, as the cables likely come from the same one or two suppliers from panda land. May have to return/buy a few, as some cables have problems (bent pin-easy DIY fix, to dead cable). Installation easiest on a Windows 32bit OS (XP, Vista, 7). Ask friends/family if they know someone in IT, as this person will likely have obsolete laptops laying around, and might be able to donate for free. B/C the software is hacked, recommended to install on a spare laptop; do not use this laptop for sensitive information (log in & passwords: email, bill payments, etc). This laptop is now your Toyota/Lexus diagnostic laptop. Mac install possible, you just need to search online.

Should you stop driving a Toyota/Lexus, you can easily sell your Techstream laptop set-up here.
Private Sales | PriusChat

 

well done!