I have these codes 2002 Prius 250K Miles

Discussion in 'Generation 1 Prius Discussion' started by HarryClock2002, Jun 13, 2020.

  1. HarryClock2002

    HarryClock2002 New Member

    Joined:
    Jun 13, 2020
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    Location:
    Rehoboth Beach DE
    Vehicle:
    2002 Prius
    Model:
    ----USA----
    Any Ideas? Here Are The Codes!
    P0420 - Catalyst System Efficiency Below Threshold (Bank 1)

    P0430 - Catalyst System Efficiency Below Threshold (Bank 2)

    P1636 - HV ECU Malfunction

    P3000 - HV Battery Control System Malfunction

    P3001 - HV Battery ECU Malfunction

    P3029 - Battery Block 19 Becomes Weak

    P3030 - Disconnection Between Battery And ECU

    P3100 - HV ECU Malfunction

    P3105 - HV Battery ECU Communication Circuit Malfunction

    C1259 - HV System Regenerative Malfunction
    C1310 - Malfunction In HV System
    D1E67762-9418-40D8-B851-30C12199CEBA.jpeg
     
  2. Nelsonprius

    Nelsonprius Junior Member

    Joined:
    Jan 28, 2019
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    Location:
    Nelson, BC Canada
    Vehicle:
    2001 Prius
    Model:
    I
    You need to open the HV battery covers and look at the HV computer and connections for corrosion or burnt wires, replace as needed. Replace weak module. Your catalytic convertor may be blocked with soot or no longer working.
     
  3. HarryClock2002

    HarryClock2002 New Member

    Joined:
    Jun 13, 2020
    2
    0
    0
    Location:
    Rehoboth Beach DE
    Vehicle:
    2002 Prius
    Model:
    ----USA----
    If I open the hv battery, do I need the 12v Disconnected? Were in the battery would I find a burned wire?
     
  4. Nelsonprius

    Nelsonprius Junior Member

    Joined:
    Jan 28, 2019
    67
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    Location:
    Nelson, BC Canada
    Vehicle:
    2001 Prius
    Model:
    I
    If you can't afford a trained technician, I suggest you look at YouTube videos for how to uncover and inspect Gen 1 Prius HV battery. Yes you need to disconnect the 12V &HV batteries
     
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