Issues after ac compressor changed

Hoping to get some help with my 2006 prius. I have just recently had a reconditioned ac compressor put into my prius however, not long after my car has warning lights coming on.

Before I get into more detail note - the HV battery has under 12 months ago had a battery with reconditioned cells put in and was tested and running fine.

I got:

• Master warning light
• Brake system warning light
• Hybrid system warning light

What happened next - manage to get my car home and run diagnostics and I get High Voltage fault code POAA6. Turn the engine off and next thing I get is that the car won't go into READY mode.


Mechanic number 1 - cleared the codes and told me its fine to go not. Drove the car for 70 kilometres with the ac going and again, same warning lights came back on. Ran diagnostics and same error code POAA6 and again won't READY after I turned the engine off. I still recon it's the AC compressor that was put in. I decided Mechanic 1 didn't really know what he was doing so got someone else.

So - off to MECHANIC 2. MECHANIC 2 cleared the codes and I did stress to them that I think it's the ac compressor but told me it was fine and doesn't physically appear to have an issue. Drove it, warning lights came own, same code came up and won't READY again. MECHANIC 2 came back a second time told me he was certain it was the 12V battery this time around

My mechanic ran tests on my 12V aux battery and said that he think it might be that as it was reading low. I didn't think that was the issue since it was reading 11.8 to 12.1 at the time but since it was old anyway, we replaced the 12V battery.

You'd think 3rd time luck right, but no. Around another 70 kilometers, the same warning lights, the same POAA6 code.

What do I do now? FYI I'm an asian girl with a retired mechanic dad so I know bits and pieces about cars. But no-one wants to listen. I do just bite the bullet and take it to a dealership or does anyone know a good hybrid mechanic in Australia, victoria who will actually listen?