Water leak and now P0AA6

Check the battery voltage and bring car back to the windshield place for reseal

 

welcome!

how many miles on her?

is it at a toyota dealer?

for more detailed code information, a shop with toyota tech stream diagnostic software should be used. or you can buy it on amazon.

it is possible that the water is the cause, but not positively, without the code details.

 

there are a lot of threads here on tech stream. you need a compatible laptop to run it on. it can be a bit complicated, so i would read as much as possible before proceeding.

most have good success, but a few have not.

you could ask them to put in a new 12v to see if it works, if they agree that you don't have to pay unless it proves itself.

 

In my experience, and with the limited size, reserve capacity of the Prius 12v battery, and the potential that your 12v battery is original to your 2013 Prius, it is completely plausible that your 12v battery has in fact, become marginal. Let me explain: When technicians are working on the Prius, they often do so with the doors open. This of course, illuminates all of the dome lights, running down the 12v battery. Whenever I bring my car in for service, I flip the dome override switch to OFF, because I have had this happen before.

Furthermore, as we all know, a 12v battery in its death throws can definitely trigger confusing DTC's and hybrid error codes. If your 12v battery is original to your particular model year, then we are going on 7 years old. You received great service from that battery, and its service duty is now ending.

I would bring a multimeter to the 12v battery directly and make sure the resting voltage is 12.8v (+/- .3v); if it fails this basic test, you are due for a new 12v battery. If you have 12.5v or more, then you are correct, and something else has occurred, but my experience tells me that your 12v is begging to be taken out back and put out of its misery.