P0AA6 code on 2007 Prius

Car suddenly threw codes about 5 blocks from my house yesterday, at 215k miles. Drove it 115 miles, in the rain, the day before with no issues outside of a couple of weird slowing/coasting moments while on the freeway. (Similar to what one would experience before a regular transmission goes out on a non-hybrid.) Did not see any additional codes or sub codes. Cleared it and drove it back home. I suspect transaxle, but will need to do more sleuthing. Bought it used at 30k miles. I've replaced transaxle fluid w/ Toyota WS, twice, in the time I've owned it. First time around 80k miles. Last time was around 160k miles. Fluid was clear with little accumulated filings on the plug magnet. Traction battery was replaced last summer with a rebuilt Dorman. Mileage has been good at 46-47 mpg, now that we are back on summer fuel stock. Winter grade runs around 43-44mpg.

If it is the transaxle, it is work I am unable to complete myself. Does anyone know a reputable repair shop in the Waco/ Austin TX areas?

 

Thank you. I have a code reader, but my computer screen was dim and I didn't see the snowflake to click on it for the sub codes. I had to clear codes to get the car to start and move into gear to get it home. I will have to do further testing to determine cause.

The main question is not what is causing the problem, but is there a reputable shop in my area do do the work, as I cannot R&R the transaxle on my own - if that turns out to be the issue.

 

Does he also replace transaxles? The hybrid battery is no biggie and has a 3 yr warranty. I put it in last summer. Not rocket science; just heavy.

 

Good to know. Once I have time to replicate the fault code, I have someone I can call.

 

OK? Drove the car down the street half a block and it threw codes again.

I got P0AA6 with sub codes 526 and 612

And C1259
C 1310 Sub code 156
B 1521

 

O'Reilly Auto Parts. It lasted a year and 10 days. Bummer...

 

Just did a quick check of the 12v. I have not cleared the code from earlier and don't know if that affects the reading. My 12v was 11.8 -not good, without load and 11.5 with load.

Should I clear codes and retest in the morning? This is one of the requirements I have to need for warranty replacement of the traction battery. Just in case a bad 12v is causing the crazy behaviors.

 

True that! Part of the warranty requirement is that I test the 12v. I am relieved to find the 612 code, but wish I didn't have to deal with it at all. I'm tired of replacing the traction battery every 2 years and even more upset that this one only lasted a year.

 

It's not so much that it's too much, as I have already had the battery replaced 3 times before this one by Houston Hybrid (Not knocking them. Received good service. It just gets old.). Now this one that cost me another $1300. I should have -hindsight is 20/20- gone with a new one.

 

They've been great in the past. What I run into is having to replace two tractions batteries at roughly the same time, as I own both an '06 and '07. For the most part, they've been great cars. Although, the '06 is the better of the two. I'll give thought to how I'm going to deal with this. Dorman may be crap, but it did come with a 3 yr warranty. On the other hand, not having to fuss with it or risk getting stuck away from home has its merits, too.

Thanks for your help. I appreciate it.