If you've ever had your hybrid vehicle not starting (READY), at every ignition shut down when it rains, or you've been to a car wash lately, the culprit may not be outrightly replacing your hybrid pack, as maybe suggested to you.

Your tech guy, may have also retrieved a P0AA6 trouble code, and is finding it difficult troubleshooting the fault.

Sometimes, water intrussions, have been known to cause these problems, if the vehicle's high voltage system buffer between it and ground (chassis) is compromised.

This is what we call, an isolation (or insulation) problem, where the vehicle does not restart kr comes to READY, no matter how you press on the push button.


Here's an article written on how to investigate similar problems, on a hybrid highlander.

https://www.dxta.net/2021/11/12/how-to-investigate-a-recurrent-p0aa6-problem-on-toyota-hybrid-vehicles/


Here are two short video clips on how we investigated this particular problem on a 2008 hybrid highlander.

https://youtube.com/shorts/o5I0NI6O36Q?feature=share


https://www.youtube.com/watch?v=4JCHtV4AniU


Regards,
Joseph