P0A93 Inverter MG1 and MG2 high temp

So I've been reading over past threads already on this code. It's weird because I bought and replaced the pump from a Toyota dealership back in February 2020. No codes til now.

I did check for the swirl in the overflow tank and it seems to be...well, swirling.

I read how the inverters insides can get clogged with crap inside the coolant passage, yet wouldn't that affect the swirl? (Need some help with a 2006 Prius. P0A93 P00D1 MG1 inverter MG1 and MG2 winding temperature readings. | PriusChat).

Anyone have a pic they can reference to? Do I need to open up the inverter and find out what's going on?

Car drives fine for a bit then throws the code. Torque App pegs MG1 and MG2 temp threshold heading past 197 F degrees, highest was 210 F!

Thanks.

 

I never thought about that...but is that a sign that the MG1 and/or MG2 are about to go out? What else causes the blobs to appear in the inverter?

 

Holy Lord, so I checked the reservoir again today. No swirl. AM2 fuse fine. The damn pump was purchased BRAND NEW from Toyota Dealership back in February 2020! I'm going to contact them tomorrow and ask if they have warranty on the thing.

I did change the coolant fluid from the inverter because while I did duckbill off all the hoses to catch coolant, my friend forgot one and dumped the entire load out so I had to end up cleaning and buying fluid. I took it as a sign that 1) my friend wont listen, 2) I guess she really wanted me to change her fluids after all.

 

You got it.

I haven't considered that the wiring and plugs might be bad, I figured I'd at least pinch the hoses and test the pump (bought a replacement ready to go just in case). Lousy Toyota dealer is telling me they won't warranty the pump because it was installed on the car. Guess I should have kept it on the shelf?

I'm just a bit perturbed that it died since being installed brand new since Feb 2020. I was wondering if I got one of the shoddy recall sourced ones.

 

Right, I bought the item off Amazon marketplace (was a Toyota dealer on there). There was no mention that electrical parts are not covered if user installed, so Amazon quickly found my point of view. I would have done the eBay Toyota OEM part route yet the car is dead in the water and I need to extract the part out to get my refund through Amazon.

The pump wouldn't go bad as a result of the MG1 or MG2 going bad, right? Its just a simple pump that is on all the time. I thought they usually burn out after 50-70K, so I was surprised it took a nose dive this quickly. What is the normal operating temp of MG1 and MG2?

 

Dang. The dealer told me electrical part, so its not covered. I know in California, the warranty is 1 year, unless explicit in terms or the ad. I'm going to give Toyota USA a call. Talk about screwed up.

Not sure how I installed it correctly, it's not even a pump that has a servo or clutch. The damn thing just has power and runs all the time...

Thanks for this post, and all the other help guys/gals.

 

So I was reading up on the inverter coolant service interval, was thinking that the "blobs" can accumulate in the inverter passages causing it to fail...has anyone safely run radiator flush stuff?

 

Did the service today. No blobs, took apart everything for good measure. Bought original SLLC from Toyota dealer, who was running a special at $21 a bottle. Not bad considering the Zerex comparable goes for $19.99 in my area.

So so lucky inverter is ok. I was so worried I toasted it.