P0AA6 526 612

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Here is the workup for DTC P0AA6 in case someone needs such:

https://attachments.priuschat.com/attachment-files/2018/04/145252_2006_Prius_RM_-_P0AA6.pdf

And here is an image showing the various INF (subcode) areas for that P0AA6 DTC (aka P3009).



If lucky, it may just be simple corrosion in the HVB ECU and associated cables/connectors.

FYI : you're moderated until you've posted 5 times.

 

It may not need replacing, but that is one approach for sure. In the techstream results (click on the blue flake just to the left of the DTC P0AA6 for the freeze frame data), what is the 'Short Wave Highest Value' voltage reading at? (closer to 5 is better)

Here is an example image, and you may find this 'short wave highest value' elsewhere within techstream as well :




How dependable must the vehicle be? (is the vehicle used for work, school, doctor, something critical, etc)

How long does the repair need to last? (do you have an interest in revisiting this problem in weeks/months, or spending additional $$$)

Do you (or someone you know) have basic tools and a DIY attitude?

The only person that I would personally recommend is 6+ hours away, unless you want a new replacement option. Paging @TMR-JWAP

 

It means there is a voltage isolation leak (P0AA6), and it is likely a leaking module within the battery pack.

You could install a new OEM or NEW aftermarket HV battery, and that would likely solve your problem for another 10+ years.

Best not to buy into the refurbished/reconditioned battery racket (think USED), as most are overpriced for what you get, or don't get. If you need an affordable option or someone to install a NEW battery, then you should call or text Jim, his contact is in his profile @TMR-JWAP

 

They should be fine. There is also a lithium option, and the OEM option from the dealership.

 

Nope. Either keep them, gift them or sell them.

 

Can you go through that a little more slowly? I've read it over a couple of times and can't quite make out what you are saying about block 2.

 

Fire up techstream, do a health check, click on any of the DTCs that have a snow flake, look for the INF, and post them in this thread. Example of where to locate them below :



and




Check the connection(s) on block 2. The HV battery voltage sense harness should be new, as it's included with the new battery kit. I would check for corrosion in the ECU next, and since you have techstream



If those look good, then take a peak inside the ECU and look for internal corrosion or whiskers :



This thread has more images that may be helpful : The battery fires at ECU sense connector thread | PriusChat