My new car tried to kill me

Discussion in 'Gen 5 Prius Main Forum' started by boardhead, Oct 22, 2025 at 7:33 AM.

  1. boardhead

    boardhead New Member

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    I was driving my brand new 2026 Prius Prime SE home from the dealer and the Lane Tracing Assist tried to steer me into a concrete barrier. So I'm having doubts about this feature. I guess the feature doesn't care about obstacles in your lane. I was in a construction zone and my lane was routed around the construction area which was surrounded by concrete barriers.

    I will investigate whether the lane assist can be disabled, but are there cases where it actually proves useful? (Besides falling asleep at the wheel, which wouldn't be a problem for me in my daily driving.)

    - Phil
     
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  2. bisco

    bisco cookie crumbler

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    i've survived without it for 55 years of driving. does it usually work well?
     
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  3. PickyAudioGuy

    PickyAudioGuy Junior Member

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    Did the construction crew properly paint lines through the construction zone?
     
  4. PriusCamper

    PriusCamper Senior Member

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    Take it back and get a refund... Let as many people know as possible.
     
  5. bisco

    bisco cookie crumbler

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    set it on fire in front of the dealership
     
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  6. PriusCamper

    PriusCamper Senior Member

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    The nature of construction zones means that lots of the paint lines will be changing and the reason why they use all the additional flagging and marking.

    If you and Toyota are going to blame the construction contractor rather than vehicle safety systems everyone is going to laugh and you'll never win in court. If a car with features that can control the steering can't recognize the challenges of construction zones then you're looking at billions of dollars in product liability litigation.
     
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  7. BiomedO1

    BiomedO1 Senior Member

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    Sorry, that rite is ONLY reserved for TESLA; like burning the American flag.:mad::D:p:cool:

    I believe there's a button on the steering wheel that disables that. Didn't the dealership walk you through those controls before leaving the dealership or were you already asleep? They are suppose to do that according to the north American dealership handbook. I believe the 2026 is equipped with the driver's attention monitor - That you CAN NOT disable. May be possible to turn it OFF with techstream.
    I'm pretty sure the dealership made time to pitch selling you remote services package, so you could stay connected to the internet while your crashing.

    YMMV

    Just remember this as you filling out your owner's satisfaction survey, unless the dealership made you fill that out before handing you the keys.:(o_O
    You'll really be pissed when to catch a flat on those thin OEM tires. I got 3 in 35K miles - a record for me. I usually go more than 150K miles between flats. Got 10K on my new, thicker set of tires. Found a nail during my last tire rotation, pulled it out no leaks. 'Knock on wood'......
     
    #7 BiomedO1, Oct 22, 2025 at 3:35 PM
    Last edited: Oct 22, 2025 at 6:51 PM
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  8. Blackat

    Blackat Active Member

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    I disabled it on mine.
     
  9. Gokhan

    Gokhan Senior Member

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    Unlike on Tesla, Toyota Lane-tracing assist (LTA), which is part of cruise control, works in full collaboration with the driver.

    LTA is not full self-driving. If there is a construction zone, you are supposed to at least collaborate with it or even better turn it off. To turn it off, all you need to do is to tap on the brake or use the suspend button on the cruise control.

    So, this is in no ways the car’s fault. You need to learn how to use the cruise control with LTA.
     
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  10. boardhead

    boardhead New Member

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    Thanks for all your comments. No, the dealer didn't explain any of this to me but they did send me an email with a bunch of links to videos that I may eventually get around to watching.

    I was being playful with my topic title. I was more surprised than anything that the feature would do this, but I was paying attention so there wasn't any chance of an actual collision.

    And I won't be setting fire to this car in front of the dealership. :p

    - Phil
     
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  11. BiomedO1

    BiomedO1 Senior Member

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    Bummer; was looking forward to a BBQ......:D:cool::p
     
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  12. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    On my 2025 Camry, I have found LTA problematic unless driving on highway speeds on a straight road and ONLY if a vehicle you happen to be following is centered in the lane. It seems to trust the vehicle in front over its line detection algorithm. If the road is too curvy, it usually veers too far to the right, triggering Lane Departure Alert.
     
  13. bisco

    bisco cookie crumbler

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    i'm sorry to hear that, i had hoped 3.0 would be better than our 2.5
     
  14. Zeromus

    Zeromus Active Member

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    I haven't had a single issue with 3.0 for lane following. If it loses track of lines on the road, it turns off the automated cruise control feature. And if you're driving through heavy construction with multiple changed lanes, you should be driving manually anyway. And if the issue is the gentle correction for lane drift associated to the lines on the ground, and driving through that in a construction zone? Well toyota has given all of us a very conveniently placed one touch physical button on the steering wheel that turns the lane warning feature on and off easily.
     
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  15. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    It is a disaster on most any road 35 mph and lower with any curves. I have encountered some curves at 60 mph that cause it to fail. Perhaps there are some differences between the Camry & Prius.
     
  16. BlueMagnet

    BlueMagnet Member

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    Pretty frightening the first time. Two hands on steering wheel at all times when driving this car.
     
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  17. Gokhan

    Gokhan Senior Member

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    LTA is meant for only mild curves. You need to take control for moderate or steep curves.

    Again, TSS is not full self-driving.
     
    #17 Gokhan, Oct 24, 2025 at 3:04 PM
    Last edited: Oct 24, 2025 at 3:23 PM
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  18. Zeromus

    Zeromus Active Member

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    If the curve is enough that you need to drop down half the speed to make the curve, and could be considered a turn in some scenarios, yeah. I still can't tell if they're complaining about the car not truly driving itself around all curves, or if its about the car warning about lane departure by shaking/holding the steering wheel while trying to drive through a construction zone or not. In both cases, you just... drive?

    "oh man, there's a lot of painted lines the car is getting confused by" you have a button to disable the feature.

    "oh man thats a big curve and the adaptive cruise control is not slowing down enough for my liking" you press the brake pedal to slow down, cruise control turns off, you make your turn. And then you press the button to resume the cruise control again. That's... how cruise control has always worked. And now, it is very good at keeping you in your lane and through gentle curves in the road to make a long road trip easier on you. Or to make traffic less annoying to sit in as it does the stop and go highway driving for you.

    I think people want more functionality than the car offers, then get mad because they're using the features in situations they aren't intended for, and then claim the car is trying to kill them. Because, they rely too much on the car doing the driving rather than helping them do the driving? You can't offload THAT much responsibility to the car. Let's be honest.
     
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