Intermittent Red Triangle - not diagnosable ...

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by frustratedInSeattle, Nov 8, 2025 at 9:43 PM.

  1. frustratedInSeattle

    frustratedInSeattle New Member

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    I'm really skeptical about the cause of the triangle having anything to do with the brakes, since it never happens when I brake, always when I am depressing the accelerator. I will stop into Les Schwab on Tuesday to have them check the front brakes. I wouldn't be surprised if I need new pads and rotors, but I just like to get a second opinion. I wasn't there to see them. I will call the mechanic on Monday to see if I can get more information.
     
  2. frustratedInSeattle

    frustratedInSeattle New Member

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    The last thing I want to do is replace expensive parts that don't fix the critical Triangle Issue. I am also a bit concerned that the mechanic just hooked up the car and diagnosed it without doing some thorough investigating. And yes, I understand about the codes have multiple causes, but of course I have been relying on what the experienced mechanics believed.

    Others have mentioned that there are probably multiple things going wrong, and that is undoubtedly true. For instance, I have chosen not to fix the tire sensors. I just check their inflation periodically. I need to fix what is most critical. I need to keep the car going for work, even if I can't drive it out to see my child. There is no way I can buy another car right now. I am paying off a lot of medical debt. I don't have any extra money in my budget.

    Please stay tuned, I will post as soon as I know more info, including all the codes.
     
  3. PriusCamper

    PriusCamper Senior Member

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    They're going to try to sell you a brake job whether you need one or not. Hold on to your money until you get this figured out.
     
  4. frustratedInSeattle

    frustratedInSeattle New Member

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    Oh yeah, I just need to see what kind of shape they are in. They shop claimed the front brakes were metal on metal, which seems strange since they aren't making any noise. I will get them done if they are really that bad, but probably not from Les Schwab. They use OEM parts, so are pretty expensive. I would just get some decent quality after market.