Help! Torque converter went bad?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Lemonhead228, Aug 12, 2025.

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  1. Lemonhead228

    Lemonhead228 New Member

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    I did drove the car around for another week when it happened to trigger a code but nothing.

    Im going to try and clean all the terminals and connections. Hopefully it helps.
     
    #21 Lemonhead228, Aug 29, 2025
  2. hurricos

    hurricos Junior Member

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    I am struggling to believe you aren't getting any codes or blink codes. How are you trying to retrieve error codes from the system?
     
    #22 hurricos, Aug 30, 2025
  3. Lemonhead228

    Lemonhead228 New Member

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    Obd2 scanner. I even left it plugged in for live data to se if it catches anything. Nothing.

    I just cleaned my bus bars and sanded down all the connections. It wasn't super corroded but did have little build up. I believe all my battery are in good condition but what Tombukt2 said does makes sense. Battery read good volts but might not be getting full amps because of connections. Will up date this week when I get the battery back into the car.
     
    #23 Lemonhead228, Sep 2, 2025
  4. ChapmanF

    ChapmanF Senior Member

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    Are there any warning lights illuminated on the dash?

    If there aren't, it's unsurprising to see no codes. Nearly all trouble codes, when set, will light at least one warning light.

    If there are no lights and no codes, it's possible that you're worrying (as suggested upthread) over behavior that is within the range of normal for your car's age and condition, and doesn't cross any threshold that would set a code.

    If there are warning lights and the code reader you're using says no codes, that's most likely the fault of the code reader you're using, and the thing to do would be to select another one after reviewing this thread:

    Gen2 OBD2 app review | PriusChat
     
    #24 ChapmanF, Sep 2, 2025
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  5. Lemonhead228

    Lemonhead228 New Member

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    My catalytic converter was clogged!! Got a replacement on and it rides like new!! Back to 45mpg baby!

    I put the battery back on and still have the issue. Did a full tune up, spark plugs, air filter, etc.. same thing.

    I read up some more on and some mention the cat could be clogged which made sense because it won't throw a code for it.

    Hope this helps anybody that has the same problem.
     
    #25 Lemonhead228, Sep 10, 2025 at 3:42 PM
    Mendel Leisk, bisco, hurricos and 1 other person like this.
  6. bisco

    bisco cookie crumbler

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    congrats!
     
    #26 bisco, Sep 10, 2025 at 9:17 PM
  7. hurricos

    hurricos Junior Member

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    Thank you for persisting. I'm glad to know now that real loss-of-power can occur without fault codes.
     
    #27 hurricos, Sep 11, 2025 at 9:41 AM
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