1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Gen 1. Code 3000

Discussion in 'Generation 1 Prius Discussion' started by bigblock67, Nov 22, 2022.

  1. bigblock67

    bigblock67 433K with new cells

    Joined:
    Feb 27, 2011
    169
    35
    6
    Location:
    Indiana
    Vehicle:
    2002 Prius
    Model:
    N/A
    An 02 is stumbling at idle and run up. Code 3000. Changed plugs; and wires; mass air flow sensor
    Need advise on this please
    Thanks
     
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,774
    4,372
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    Isn't there a letter before the 3000 code? If not the device that's reading the error codes isn't programmed with Prius Specific error codes. What type of device are you using?
     
  3. ammdb

    ammdb Active Member

    Joined:
    Aug 8, 2019
    263
    106
    1
    Location:
    Indianapolis
    Vehicle:
    Other Electric Vehicle
    Model:
    N/A
    I've read this code can be caused by corroded pins in the HV battery connector going to the battery ECU. It's a simple check to pull the connectors under the carpet in the trunk and inspect the pins.

    Clean the throttle body to see if this helps with the rough idle.
     
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,073
    14,980
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    The bigger problem here is that P3000 is one of those 'hearsay' codes. It comes from the HV ECU (which lives under the carpet at the passenger's feet) and it only means "hey, I heard from the battery ECU there's some problem back there, get his trouble codes to find out more."

    And you haven't got the battery ECU code(s) to go with it, which are what would tell you in detail what the situation is. If you used a scan tool that showed you the P3000 but didn't show you the original code(s) responsible for it, a better scan tool that shows the original code(s) would be helpful.