Dealing with P3030 gen 1 hv battery acid and sealant

Discussion in 'Generation 1 Prius Discussion' started by TuJo, Oct 6, 2020.

  1. TuJo

    TuJo New Member

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    2003 Prius
    Model:
    I
    Hey all I’ve got a 03 Prius that I didn’t drive for 7 weeks (I know...at least now I do ‍♂️) wouldn’t start obviously so I charged up the optima 12v (tested and it’s good) still no start so checked codes and got p3030. Took the hv battery out and opened it up to find lots of leakage and sealant. There was so much glue that I broke the orange plastic harness trying to pull it off. That stuff is nasty. Anyways I’m wondering if I need to buy a whole new harness or if it’s ok. I’ll add a picture. Also I’m trying to sort out how many new battery packs I need. And haven’t wrapped my head around how to balance them? Most of them are in the 6.5-7.1v range. Couple stragglers are around 5.5. Handful in the middle are at like 1.2. I took my 12v charger and charged a couple of those in the middle for like 30 seconds at 15amps and the quickly jumped to 8.9. And then slowly fell to 7.3 and held. Is this ok? I’ve read a couple people saying it is and one person saying charging at those amps is dangerous because it creates gasoline in the battery? I’m soaking the bus bars in vinegar and also wondering if I can spray vinegar on the glue and acid that’s all over the battery packs and harnesses.
    Thanks for reading and sorry for the ignorance/long-windedness I’m fairly new to this. Greatly appreciate all the contributions to this forum.
     

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  2. Stimp

    Stimp Member

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    2004 Prius
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    ----USA----
    Use the vinegar (~5% acetic acid) to neutralize the hydroxide solution leaking from the batteries. Be safe, protect your skin and eyes from splashes.
     
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  3. TuJo

    TuJo New Member

    Joined:
    Oct 6, 2020
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    Location:
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    Vehicle:
    2003 Prius
    Model:
    I
    DC03428C-A21E-4D91-985B-0781CB6300A3.png 2E992F14-FEFB-484E-AA89-9033FC4CCFC0.jpeg ABBCD8DD-010F-4BA2-87B7-15C69C0C47BF.jpeg 0891215F-4F05-455B-8475-FD762638CCC3.jpeg Thanks. I swapped out 12 of the modules and balanced the pack best I could and put it back together and it started up. Hurrah!
    Ive been driving it but it’s still throwing the p3030 code. It has also thrown p3191 and p1455 and p0302 in the past few days. Always p3030.
    Im hoping the cylinder 2 misfire (0302) is just because of some bad gas from sitting for 2 months...
    any other insight on any of this would be much appreciated.
    I’ve also gotten a Bluetooth code reader and have read that there are apps where you can monitor the levels of the 38 modules but I haven’t found such an app for iPhone. Anyone know of one that works?
    I’ve attached some pictures of dash status and codes.
    Thanks in advance for any insight.
     
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