NEED HELP PLEASE 2008 prius won't start with hybrid battery replacement

Discussion in 'Gen 2 Prius Main Forum' started by Juancho512, Nov 30, 2022.

  1. Juancho512

    Juancho512 New Member

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    need some help please , I have a 2008 prius and my hybrid battery when ignition is turned on all the warning lights come on and they hybrid battery mark purple on 1 line of charge I did a test on a scanner and all show 14.8 beside 1 showing 12.0 ... can this be the problem as to why it won't start? When I clear all the codes they immediately come right back I attached a pic of the scan
     

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  2. bisco

    bisco cookie crumbler

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    probably. what's the back story on this battery?
     
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  3. Juancho512

    Juancho512 New Member

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    I just got it today from a junkyard and they said its warrantied for 30ndays Sonim calling tomorrow to get it replaced ... car was fine before this woth the original battery. But we jumped it after 2 months sitting and than the ev control ecm gave out and it was really low on the hybrid charge. I replaced the ev control ecm and that code went away but it wouldn't start so I got another battery and this new to the car battery is also at the same low charge as the previous one I'm assuming that is why it won't power ont the gas motor but I'm unsure until I have a charged hybrid battery
     
  4. Juancho512

    Juancho512 New Member

    Joined:
    Nov 30, 2022
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    Location:
    02909
    Vehicle:
    2008 Prius
    Model:
    II
    I just got it today from a junkyard and they said its warrantied for 30ndays Sonim calling tomorrow to get it replaced ... car was fine before this woth the original battery. But we jumped it after 2 months sitting and than the ev control ecm gave out and it was really low on the hybrid charge. I replaced the ev control ecm and that code went away but it wouldn't start so I got another battery and this new to the car battery is also at the same low charge as the previous one I'm assuming that is why it won't power ont the gas motor but I'm unsure until I have a charged hybrid battery
     
  5. SFO

    SFO Senior Member

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    A DIY grid charger, or an off the shelf HV battery charger might be helpful going forward.
    Which OBD2 codes did you have, or do you have now?

    How many miles on the vehicle?
     
  6. Juancho512

    Juancho512 New Member

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    2008 Prius
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    II
    Good news is the hybrid battery I purchased was bad and got it warrantied and got another one now good one ... the problem was also the new hv ecu replacement I had installed .... I had no Idea I would have to reprogram the fob key so I shorted the 4 and 13 pins for 30 minutes than cleared all codes and she fired right up .... not bad for a 289,000 mile girl she's a champ
     
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