Lexus GS450H

Discussion in 'Newbie Forum' started by PeteGS450H, Oct 7, 2025 at 8:44 PM.

  1. PeteGS450H

    PeteGS450H New Member

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    Other Electric Vehicle
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    My 2007 GS450H is similar to a Prius except it has 40 battery blades whereas a Prius has 28.
    I have just installed 40 new blades in my GS450H. Pack looks good according to diagnostic (photo) but getting error code P0A0D. Safety plug was correctly installed but there is almost no voltage at the port.

    I have discovered there is almost no voltage at the battery terminals the safety port is attached to (photo). When I test these terminals independently they show 150V and 165V respectively. What could be wrong?
    Thanks
     

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  2. bisco

    bisco cookie crumbler

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    is the fuse inside the plug okay?
     
  3. Brian1954

    Brian1954 Senior Member

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    There is nothing wrong with the hybrid battery. You are only seeing 2.4v on the meter because of where the positive and negative probes of the meter are connected to. Think about what you are measuring across those two terminals.
     
    #3 Brian1954, Oct 8, 2025 at 6:01 PM
    Last edited: Oct 8, 2025 at 6:17 PM
  4. Hayslayer

    Hayslayer Member

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    If your safety plug is similar to the Prius, you probably missed the last step of installation where you have to slide the lever about a half inch to engage the safety interlock contacts. If you didn't do this last step, the car thinks the interlock device is not installed. It could also be that during your rebuild, you forgot to install the interlock wire at the contact point on the interlock socket.