P08A0 - Need Help!

So an update after I took the car in for the recall repair (I think it's called SSC J0V/J0V00D, Hybrid System Update), the local $tealership came up with a bevy of lists they think the car needs repair on (I should preface that I very recently purchased this car and it had a decent amount of miles, but the previous owner replaced the engine and fluids at a reputable shop in the area and had all the paperwork which was done very recently).

They listed the following for the car:

• Brake Fluid Flush (asking for a whopping $350, it seemed fine to me, but I can always DIY this as I have in the past...)
• Minor Transmission Service AKA Transmission Fluid Flush (they claim the transmission fluid is "dirty", how do they even inspect that?! all for a whopping $279)
  
• Clean Throttle Body & MAF - This was literally one of the first things I checked after buying the car, it was nearly pristine clean, I even checked afterward... all this for a whopping $248)

I am astonished how the $tealership quoted all that, especially the transmission fluid, maybe the fluid needs actual changing, I do not know, but how can they determine it's dirty and needs to be "changed"?

Anyways, I bring all this up because as I got home, I checked the car and the P08A0 "Permanent Sign" was still there (kind of assumed maybe it gets erased with the recall update?), however no red triangle or check engine sign. I am almost ~500 miles in now driving as I reguarly do, getting decent MPGs.

However, a new Permanent DTC appeared right after the recall repair, it is "U0100". No idea what this code even means from my short time researching. Is this something I should call the $tealership about and see what happened? Or can this actually be somehow related to P08A0? I do want to preface this once again as there has been no Red Triangle or Check Hybrid Sign/Check Engine light, this is only appearing when I run a scan through Techstream which shows Permanent DTCs which cannot be erased easily.

 

Update! After driving my regular commute, the "U0100" error code/DTC went away. No idea why it even came up for a brief period of time, but this "permanent DTC" is gone, so I'll take this as a good thing. However, P08A0 "permanent DTC" is still there. No red triangle, check hybrid sign or check engine however. I am going to a different hybrid battery shop that seems to be reputable and hoping if maybe they can provide more clarity on the situation.

On an unrelated note, the dealerships comment on the transmission fluid needing to be replaced because it is "dirty" really intrigued me on if I really need to do a flush/replace? I know there is no dipstick for the Prius transmission, so how would one go about actually inspecting the fluid if it truly does not be replaced?

 

Updates!

The P08A0 code is finally GONE! Woohoo! It looks like changing those couple of cells, cleaning the fan and buss bars did the trick. The battery is definitely reporting healthy levels of charging and giving me fantastic MPGs. It looks like the magic number seems to be 600 miles when the permanent DTC goes away (that is where I am sitting at now since rebuilding the battery pack).

I also hope if anyone who comes across this post, don't fall for the sales pitch around these forums of people pushing you to buy battery packs from there site, please do your due diligence and with a bit of patience you can figure out how to best resolve the issue.

I don't want to start another thread here, so a question on brake fluid as I was debating whether or not to replace the brake fluid, it seems to be a bit clearish, should I still go ahead and replace it, or does the fluid look "clear enough" to consider waiting a year or so? Attached pictures for reference. Brakes work just fine, I just wasn't sure if I should perform a flush.

Brake Fluid (Taken without flash)

Brake Fluid (Taken with flash)

Brake Fluid Reservoir (car was running so slightly below max line for that reason):

 

Sorry for my ignorance, the reason why I attached pictures was because I know in some vehicles brake fluid gets "darker" which means there is a lot of water/moisture in the fluid and should be replaced... I never have seen the original color of brake fluid in a Prius... would looking at the pictures above determine whether I should flush it? Or is there an idea if I can "get by" with holding a brake flush for a year (just trying to imagine the time it can take me to DIY for the first time) and rather plan it out in advance.

 

Thank you for the breakdown @Mendel Leisk I will assume from your post that the color of the brake fluid is probably not the best indicator when there is no history on the brake fluid correct? Would you say based on the pictures it could possibly be something that can be held off for a few months or something to get done ASAP?

@Grit I've been on these forums for a few years now and I personally do my best to not start new threads, but I don't find it efficient on you constantly calling this out or deterring folks to go search on the forums. I apologize if it may come off as annoying to you. I am just a DIYer and not a pro, so questions at times can come sporadically. I try my best to contribute back my knowledge and learnings so folks don't have to scour through resources or ask the same questions I once did.

 

Ah gotcha okay. Yeah, I am just asking if the pictures are helpful because it is supposed to get really cold in the PNW the next few weeks and I don't have access to a garage to do this kind of work. Based on what I have seen about the color in the reservoir turning black being a prime indicator it is "time to replace", I might just hold off a month or two (at least when it is either not raining and/or just freezing cold outside) due to the lack of history on the black fluid in general. I appreciate the information!