Prius (!), VSC, Check engine lights on.. Have done diagnostics, where to go?

So my wive jumped into her 2006 Prius with 160k miles on it today after not driving it for 5 days and the RED triangle !, (!), VCS, and check engine lights came on. I ran basic and ABS code diagnostics on it and the only code that displayed was the P0a80 replace hyrbid battery code and then in the ABS DTC's it had 11 codes pretty much saying every sensor was bad and all that. I checked 12v battery and it was at 11.8v. I cleared the codes and went for another 6-7 mile drive and the battery charged and burned as it normally should (Fully charged from blue in 2-3 miles of mostly coasting?). No codes came back up and there were no problems with acceleration, braking or anything different that I could feel. I guess I am just wondering what to do now? Drive it until lights come back on?, have full diagnostics done?, does a bad hyrbid battery typically throw weird VSC codes too? I just have a hard time believing the the battery and whole VSC system just up and died while it set restfully for 5 days. I have read many other posts on this and its how I got to where I am. Thanks for any other input!

 

Not sure how old the battery is but I bought it 2.5 years ago and not sure if it was charged before that. I checked again on the battery and it was 11.8v resting and 11.4v when head lights were turned on.

 

Thanks for the help. Happy to know it could possibly be something else and easier to fix. Note* I just went outside and checked the voltage again using the method of holding the info button and flashing lights 3 times and the resting voltage read 11.9v, 12.0v, 11.9v after 3 tests and it dropped to 11.3, 11.4, 11.5 when turning on the headlights. I also checked the date of the battery and it looked to be a toyota battery and the number was 111113 meaning Nov. 11, 2013 so i guess it was replaced the year before we bought the car. Also, all the lights are back on (Red triangle !, (!), VCS, and Check engine). Still thinking the 12v battery it toast?

 

Just replaced the 12v battery with an Optima Yellow Top for $165 from autozone and didn't need any type of adjustments to get it fitted. After starting the car again and giving it a little gas for the engine to run, all lights turned off. Going to do some more driving tomorrow just to make sure but looks like I got it fixed. Battery was a nice quick 15min swap as well. How do I go about resetting TPMS and driver auto up window control?

 

Well I went out this morning and turned on the prius and all the lights are back on. I checked the voltage in the new battery and it was reading 12.2v so I plugged it in on a 2amp charger and we will see what that does. I have noticed significantly decreased milage in the last 3k miles and my wife drives about 90 miles round trip to work 3 times a week. I also load tested my old 12v battery and it tested in the "ok" range so it may have just needed a charge and the HV battery thats dead? I am pretty mechanically savvy and could do an HV replacement if I needed to but just want to make sure I am heading in the right direction. I am located about an hour 15mins outside of Chico, CA and Sacramento, CA and thinking about possibly calling up some yards to find a battery from a crashed Prius but was wondering if anyone has had luck with that in this area. Any other thoughts?

 

I am seeing a significant amount of options for having the battery rebuilt or getting a rebuilt battery around the Sacramento area. We have been looking for a another used Prius before this happening so I am not looking to pay to have a new one installed and I can do the install myself so just looking to see if anyone in the NorCal area has dealt with anyone up here. Found some replacements from crashed prius's for around $400 as well.