Skip to content

Trouble with Diagnostic Code P0AA6


Luckily for most Prius owners, Toyota hybrid trouble codes are straight forward and easy enough to diagnose with a quick Google search. Of course there’s always going to be a few exceptions that leave you scratching your head or yelling at the sky in frustration. If you are having trouble with diagnostic code P0AA6, you might not be aware that this is an “umbrella” code and has several sub codes that need to be detected, tracking down the source of the problem will be exhausting. Let’s break down the P0AA6 code so you can understand what your car is trying to tell you.

The first step with the diagnostic code P0AA6...

If you’re reading this then your hybrid vehicle likely has warning lights present and is stuck in neutral. The first step is to read the codes. You’ll need a decent diagnostic code reader to read the sub codes for P0AA6. The diagnostic readers sold at auto parts store aren’t going to do the trick here. We recommend using Toyota Techstream for the most accurate diagnostics. To access the sub codes for P0AA6 using Techstream, just click on the snowflake icon next to the code description (run a health check first) and you’ll see a list that has “Detail code 1, 2, 3 etc.”

Trouble with Diagnostic Code P0AA6

What does P0AA6 actually mean?

The P0AA6 code is indicating a ground fault in the high voltage (HV) system. A ground fault means there’s an unintended connection between the HV system and the car’s chassis. This could lead to a host of issues, from reduced performance to safety hazards. It’s essential to address this code promptly.

This code is your car’s way of saying, “Hey, something’s wrong with my electrical system, and it could be serious.”

Remember, safety first! Handling high-voltage systems in hybrids requires specialized knowledge and equipment. If you are having trouble with diagnostic code P0AA6, always consult with a professional for diagnostics and repairs.

Trouble with Diagnostic Code P0AA6

Understanding the P0AA6 Sub-Codes:

– **526:** This is a generic sub-code, meaning the car’s computer can’t pinpoint the exact issue. It’s like your car saying, “I know there’s a problem, but I’m not sure where.” This code will likely always be present as a subcode. It’s not super relevant so just ignore it.

– **614:** This sub code points to an issue with the Inverter/Converter Assembly or the main high voltage wiring cables between the inverter and the hybrid battery.

Trouble with Diagnostic Code P0AA6

– **612:** This code signals a potential issue with the hybrid battery or the hybrid battery ECU located inside the battery pack. This is the most common sub code and is usually caused by a leak in one of your hybrid batteries cells. If you flip the hybrid battery upside down you’ll likely see a stain around one of the 8mm nuts lining the bottom of the case.

Trouble with Diagnostic Code P0AA6

– **613:** Indicates a problem with the Transaxle assembly. This part is crucial for transferring power from your engine to your wheels. Luckily, we rarely see transaxle failure in hybrids.


– **611:** This sub code points to the air conditioner compressor. We tend to see this happen more frequently with the Camry and Lexus hybrids.


If you see the P0AA6 code, it’s time to give your hybrid some TLC. Remember, while some enthusiasts love to tinker with their cars, dealing with HV systems can be dangerous. It’s always best to consult with professionals who have the expertise to handle trouble with diagnostic code P0AA6 and other complex systems safely.


Contact Us

Hometown Hybrids Team

Enter your information below and our team will text you shortly.
Thank you for your submission and our team will text you shortly

"Hi there! Don't hesitate to text us for immediate assistance—we're here to help!"