2013 Prius V - P0A94 & 553/557 sub-codes, plus P301A, P308A and P31AB

Car: 2013 Prius V iTech
Codes:
- P0A94, with 553 & 557 sub-codes
- P301A
- P308A
- P31AB with 123 sub-code
- C1657
- C1241
- C1259
- C1310

First: Truckloads of thanks and appreciation to the people who have previously posted about their P0A94 codes. At least now I have something resembling a clue about how to fix this car.

From reading through posts about P0A94 my conclusions are:
- The P0A94 and 553/557 codes indicate that the inverter has died and needs to be replaced.
- Because of the inverter failure no charge has gone to the 12v battery or the hybrid battery. The resulting P301A, P308A and P31AB codes mean that the hybrid battery is also stuffed and will need to be rebuilt or replaced (and, most likely, a new 12v battery).

Would that be a correct assumption? Replace the inverter and hybrid battery, and the car should be good again?

 

I've had the car towed to a Toyota dealership for now, and will see what they say.

Toyota Australia isn't anywhere near as friendly and helpful as Toyota US, but I'll give it a go.

If they say no then I'll buy a secondhand inverter from a wreck and fit it myself.

Secondhand inverters are common, and not particularly hard to fit... but if Toyota are willing to fix it for free then they are very welcome to.

I had a P0A94 code on a 2010 Camry last year and that ended up needing the transmission replaced. But the same code on a Prius means the inverter is stuffed, which is much, much cheaper and easier to replace than a transmission. Excellent.

 

The P0A94 code is covered under a special warranty in the US, but I don't yet know if Australia offers the same.

If Toyota Australia covers the repair cost then I'll be extremely delighted.

If not then I'll replace the inverter, and likely have a go at dismantling the dead inverter to locate and learn about the Intelligent Power Module (IPM) that fails.

What I can't work out - the Prius V seems to be known for this, but the 3rd-gen Prius 30-series has the same inverter but not the same reputation for inverter failures. Very odd.

US extended warranty on the Prius V inverter:

 

The inverter from my car got replaced... eventually... but now there's a bill at the Toyota dealership for waaaayyyyy more than what it would have cost me to just buy one secondhand and fit it myself.

It's a tad messy at the moment (ie negotiations with the dealer).

I just tried sending you my phone number but it wouldn't let me start a conversation. Call me on 0418 922 500 in the afternoon or night.