2007 Prius Bricked by Techstream

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by ZillahG, May 18, 2025 at 1:26 PM.

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  1. ZillahG

    ZillahG New Member

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    Vehicle:
    2007 Prius
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    Hello!

    I had an "engine light on" that my plug-in OBDII reader could not read. So I got Techstream on a Virtual Machine and connected it to my car, I turned my car on fully (ready mode) prior to having my Techstream App connect to the car. It ran for a single second, until the car engine turned right off, and then the Prius Monitor gave me the "engine problem" message before all the lights including the Red Triangle of Death turned on :))))))

    I have NO issues prior to this, I ran the car a few minutes before connecting Techstream in that same parking spot and it worked.

    I think my techstream/laptop might have miscommunicated with the ECUs and completely disconnected my Prius Computers from each other. Why? These are the list of codes I got, after re-running Techstream on a clean install, and connecting to the car before fully turning it on.

    Engine
    U0292
    P1121
    P1116

    Hybrid Control
    P0A1D
    P3000
    P3108
    U0100
    U0111
    U0129
    U0146

    HV Battery Live
    U0100
    U0293

    EMPS
    U0073
    U0121

    All having to relate to lack of communication between the ECU's Engine, Battery, ABS, etc...

    Has anyone had this issue before? Or better yet, how can I repair the Prius System to recommunicate with each other?

    Thanks and Godspeed.
     

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    #1 ZillahG, May 18, 2025 at 1:26 PM
    Last edited: May 18, 2025 at 1:34 PM
  2. ZillahG

    ZillahG New Member

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    I found another thread and discovered the issue was that I fully turned the Prius on before letting Techstream connect!!! Though, the thread does not propose a solution. Ah, the joy of Techstream. | PriusChat
     
    #2 ZillahG, May 18, 2025 at 1:48 PM
  3. ZillahG

    ZillahG New Member

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    Discovered the solution.
    CLEAR THE CODES!!!
    Then check all batteries. Mine weren't as good as before in voltage so I suspect some draining.
     
    #3 ZillahG, May 18, 2025 at 2:40 PM
  4. Tombukt2

    Tombukt2 Senior Member

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    2009 Prius
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    I was just coming here to tell you that you're 12 volt is the problem when you have communication problems on the can bus in a car like this your text stream even though it's hacked and you're using a funny cable and all the nonsense usually will not break a car I'm not sure about the turning on the text screen before the car that doesn't seem right usually I have the car on sitting there ready or sitting there in accessory mode with all the lights on the dash I have text stream up on the cf-13 toughbook with the VCI cable plugged into the USB port and the other end that goes into the OBD2 port in my hand and then I stick that into the OBD2 port and then I look at my screen and then I click on the nonsense connect to text stream or whatever it has to detect the car and blah blah blah throw up the serial number it has to ask me if it has SKS or not and all that and so on and then that's it if tech can't connect to the can bus it's usually not a car problem it's a 12 volt battery problem if you discovered this is usually one of the first discoveries for us owners get to make or hear about if you're 12 volt is not above 12.5 in this AGM group size you're starting to lose voltage get down in the 12.2 and the 12.1 range and you are low and beyond that you might be in all those u codes or whatever they are I don't know those that well I only know the codes that come off the scanner off the MFD have no idea I have to look them up manually it's quicker for me to plug up the scanner and get the real codes I know a lot of those pretty well
     
    #4 Tombukt2, May 18, 2025 at 8:04 PM
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