"Check Hybrid System" P0A94 and P324E w/ ABS C1259 and C1310 (doesn't reset)

Hello.

I read through many existing posts but I'm not finding a solution to my specific problem.

The other day suddenly the car went into what felt like super echo mode and although it's drivable it's noticeably weaker and has a hard time accelerating when going uphill. But it does start and run and has never shut down unexpectedly yet. (Dash picture bellow)

I accidently cleared the engine codes using my OBDII Scan Tool but the POA94 code doesn't go away. (Original codes as well as battery reading bellow)

I tried to reset all the codes to have the car run normally until the codes trip again (because I wanted to take the car in to get diagnosed and I wanted all the engine codes to re-display) but although I followed several of the instructions in the other threads the POA94 / Check Hybrid System issues causing the car to be in a weakened state does not go away.

The 12V batter was replaced about a year ago. There are about 133k miles.

Are there any suggestions of how I might be able to diagnose this issue to resolve it or how to cause the other engine code to present again? I'm somewhat afraid to drive it in it's weakened state with the Check Hybrid System message in order to hopefully trip the other P324E engine error code to come back but I think that if I take it to the dealership to get diagnosed they wont have all the data needed to properly diagnose it.

Here is the original error codes before my accidental clearing.



Bellow is the batter reading after accidently clearing the engine codes.



Bellow is the dash after accidently clearing the engine codes as well as trying to reset all codes by detaching the cable from the 12v battery, unclipping the orange clip in the trunk, unhooking the white wire in the trunk, and also turning the engine on/off several times as well as driving around and also turning the engine on/off.

 

I ran the AC at full and also drove around while taking screen shots of the battery voltage a couple days after posting and here are the levels. The state of charge seems fairly significantly down from 40% a couple days ago. The voltage didn't go down bellow 14.84 so I'm not sure that is low enough to cause this problem?

Also the engine is always running from the start.

Any advice on how to further diagnose this?

 

For the inverter I checked Toyota's website using my vin and also called and they said I don't have any pending recall for my car. I'll try to see if I can get anywhere with Toyota corporate customer service. I thought that if the inverter died that my car wouldn't start or run but sounds like that might not be the case, that's hopeful!

The reason for the differences weren't obvious to me, I started driving around my neighborhood (trying to start and stop with the AC blasting but it wasn't a bumpy road and didn't make sudden or sharp turns), and the first reading was early in the ride the last one was later... it seems like the battery gained a little charge by the end of the ride, not sure if that indicates anything to you.

 

Something loose would be ideal, but somehow I'm not feeling lucky.

Thanks I'll read up on the lawsuit details and look for that service rep.

The car is drivable, but several warning lights are on in the dashboard (image in first post) and it's definitely in limp mode. It's slow getting up to speed and engine starts to rev easily but does get there, at least on surface streets.

Initially I was getting 2 engine codes, P0A94 and P324E, but I accidently (stupid me) cleared the engine codes but only P324E went away.

Then I figured I would clear all codes to get the car out of limp mode and wait for both to trigger again but the P0A94 code wont go away (along with the lights on the dash) and now I've tried everything including unhooking battery (orange cut-off switch), 12V, and white cable under the hood leading to the box... turning the car on and off several times, driving around, etc.

Do you think I ruined my chances of getting properly diagnosed by a Toyota dealership or should I just take it there for an assessment?

 

I was under the impression that the inverter failure would cause my car not to start but now I see that's not the case. I was trying to diagnose the issue by ruling out or in problems others have diagnosed.

OK I'm going to try my luck at the dealership, I'll call them again asking specifically about the JOV recall.

Thanks for the details and advice, I will let you know how things go!!

 

That would be great thanks for sharing and my apologies I didn't realize that there would be significant differences between the Gen3 than Gen2.

 

So just to update, I was able to take the car to the dealership and after a diagnosis they did determine that it was the inverter, long story short I got it repaired - details bellow.

They told me that they can repair the inverter under customer support/care program for free BUT I had to update all my maintenance to be current first.

They listed about 1.8k of maintenance... initially they wanted to do it all but after some conversations also said I can take it to another mechanic as long as I provide receipts of the work and historic receipts of maintenance preformed because their records didn't have a lot of historic maintenance.

After checking the service manual and with our normal mechanic only the 90k maintenance was "required" and the rest was "recommended". I talked to the service manager who agreed that yes I only had to do the maintenance referenced in the manual and they can make it work by doing only the 90k maintenance.

It was about $700 for the 90k maintenance but it meant that I can just drop my car off, get a rental, and then pick it up completely fixed without going back and forth and supplying receipts and digging for records.

So now finally after a lot of time diagnosing, and reading, and negotiating the car is fixed and running without issue (so far at least).

I think it would have been quicker, less haste, headache, stress, etc. if I just took it to the dealership right away and paid their price without thinking about it all, but I did save some money doing it this way, and now I'm more aware of the details to look out for and possibly some pitfalls as well.

It restored my faith in working with dealerships, I got lucky to have a great service manager who worked with me.

Thanks again for your help, appreciate it! Hopefully this detail can help someone too.

 

Thanks again for your help! Ultimately I was able to get it repaired, details above, take care!

 

Thanks I was wondering that too :/ My first instinct told me that there's something off with that, but I was tired of trying to get this done and busy with other things that I decided to just do it. I also called Toyota beforehand and was getting push back saying that my car was past warranty and my vin didn't have the recall, while the dealer was telling me they can get it done.