Keeps going into Traction battery protection.

It's been a while since the last update on this, but I was dealing with getting the traction battery charged up enough to even attempt to start the ICU, and between that and work, it has taken quite a while.

I did end up changing the crankshaft position sensor. Once I was able to attempt to start the car, the ICU does seem to be turning on, and the crankshaft position sensor code has become inactive.

With that being said, the ICU seems to kick on for about 30ish seconds, then turns off. after about 30-60 seconds it will kick back on, but it doesn't seem to be charging my traction battery. I wasn't sure if maybe the ECU just needed time to figure stuff out, so I let it run for a little while, but then I got the traction battery protection mode again.

Using my OBD2 app, the only code that I was getting was P3000. I am a little confused though, because if my traction battery is low, even if it is going bad and won't stay charged, wouldn't that mean the ICU would just stay on once it kicks on, instead of cycling? Am I correct in assuming this is probably still an engine problem, and not necessarily the traction battery?

 

It looks like I will have to get a knockoff techstream so I can read the subcodes.

With that being said, I feel like I am missing something that may be obvious to somebody more experienced with cars. After I had charged and balanced my traction battery and reinstalled it, the car came on, and I was able to put it into drive and scoot it forward abouyt 10 feet(it was a little in the way in my parking lot). The ICE also kicked on (or I think it was kicking on. It might have just been the HV battery trying to spin up to get the ICE started.) After a little bit, the traction battery went into traction battery protection mode because it was getting low.

I guess what I don't fully know if I understand is, even with a P3000 code, if the traction battery starts, and tries to spin up the ICE, wouldn't the ICE still start at that point if there were no other issues? Once the ICE is running, shouldn't I be good to go? I am just feeling really lost here with the ICE not seeming to kick on and stay on, but also not having any codes that seem to actually be related to the ICE.

 

Upon further troubleshooting, trying to confirm my crankshaft was actually spinning, which I should've done before changing my crankshaft sensor anyways, it was definitely spinning, and the ICE did turn on, and was on for around 15-30 seconds solidly, running like it normally does, then traction battery protection mode kicked on and shut off my ICE. So while in park, with the ICE running, it went into protection mode. That being said, according to my Dr Prius app, my batteries current SOC is 15%, so i dont know if maybe it still tripped a low charge signal or something.

Other info from the app that idk how much it matters, but I've seen some people mentioning it, my Delta SOC% is at 0.00% and my volt diff is at 0.13v. I'm not sure if any other parameters are currently useful for this. The modules themselves, after I charged and balanced them were at 7.96v.

 

I received my knockoff techstream and have it installed on a laptop. With that being said, I got no new information from it.

It still pulled a P3000 code, but I don't see any option to allow me to pull up the subcodes. I think it is only giving the P3000 because the traction battery is low.

I also have a non current, permanent code for U029A which was already there but I forgot about. That code specifically only popped up when I was doing my early troubleshooting, after I tried to start the car with the service plug removed, and immediately became inactive once I put the service plug back in, so I'm pretty sure that is irrelevant, I just haven't been able to drive the car for it to remove that from permanent storage.

As far as ICE codes, I am still getting none at all.

 

I wasn't looking at the very top when I clicked on the snowflake. I thought it was just telling me all the monitor specs.
The code is P3000-388 which seems to be most associated with battery getting low.

And the car is at 250k miles.

Still pulling no codes that are ICE related, just the P3000-388 and the stored U029A.

 

I cleaned the EGR a while back, I've replaced the head gasket, spark plugs, coils, and a lot of other small work over the last 2 years. I was originally guessing the HV might need replaced, but there are specific codes associated with the HV replacement that I'm not receiving, so not sure about that.

I skimped on fully reconditioning the battery cells because it was going to take like 12 days with the setup I was using to do that, so I just did a discharge then charge on all my modules. Maybe I will just do the full recondition and see if it works.

 

After another round of battery charging try to start it up again to pull codes, it attempts to spin up just like before to start the ICE, but the ICE doesn't start. I used techstream and a regular obd2 reader to try to pull codes, but I'm not getting anything. The P3000 code cleared because the battery is no longer low enough to trigger it, but I'm sure it will pop back up before long, without the ICE being able to kick on to charge it.

Does anybody know if there are any common problems with the ICE that prevents it from starting, but doesn't generate any DTCs? I am just stumped and frustrated, because unlike a normal gas powered car, I only have a limited window of troubleshooting and startup attempts before I have to spend a few days recharging my battery.

And for those saying it is probably the traction battery, shouldn't that be generating a specific code also? From what I have read, if it is the traction battery, I should be getting a P0A80 code, which I am not.

I always do my own car stuff, and I am far from an expert. But I've usually been able to figure out and fix the problem eventually. But I've never had an engine not start without giving me some sort of code to point me in the right direction.

 

It goes into ready mode. I can even put it into drive or reverse and start driving. But when the traction battery gets low enough to turn on the ICE, you can feel the ICE try to spin up for a few seconds, then stops. After a short pause, it tries to start it up again, at which point, the ICE continues to not start. After this cycle has happened 2 or 3 times, I tried to pull the codes, but there were none.

I guess I shouldn't say none, necessarily. My air conditioning doesn't work, and I am getting a code from that. That has been there for roughly 6 months before any of this happened though. The techstream pulls a code from one of the air conditioning sensors just fine. But that is the only code it will pull. I really doubt that would be causing my problem. As far as actual engine codes or other related electrical systems, I'm getting nothing at all.