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TPMS throws errors after driving for a while

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by sylvaing, May 19, 2024.

  1. sylvaing

    sylvaing Senior Member

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    So, I've put my summer wheels back in mid March and the TPMS seemed fine. Then the first 70+ km trip I took threw the TPMS warning light. Tire pressure was fine. Stayed lit until a few shorter trip thereafter at home. Next longer trip (200 km), it lit up again. Same scenario, turned off after a few short trips at home. Going to the cottage last Thursday, it lit up again! This time, I had Carista registered so I got the reading from it and this is what I got

    Screenshot_20240516-160000.png
    (Erreur = Error)

    And after a few short rides once I got back home, TPMS disappeared and this is what Carista read.

    Screenshot_20240519-100149.png

    Same sensors, all working fine. Any idea why all of them are throwing errors at the same time on longer rides? Are their battery already dying? They are at most 7 years (and only used 8 months per year) so how could they all be dying at the same time? It's too soon. My previous cars TPMS sensors lasted over 10 years in the same condition. I can understand a bad one but all four at the same time?

    Is there something you need to do with Techstream to make them stick? Asking because I bought winter rims with TPMS sensors last fall at Costco and they are the one that programmed them. I just swapped them back last March. Is there something else that I must do?

    Maybe they are registering the winter wheel pressure in the garage hence why it unlits once back home? But usually they only transmit while the wheels are turning so I doubt that can be it (scratching head).

    It's a really strange behaviour that I hope someone can help me shine a light at it.

    Thanks.
     
  2. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    The car is still looking for the sensors in your winter tires; Toyota’s implementation doesn’t recognize more than one set at a time. Dealership can fix it with Techstream, but will very likely charge. There are some aftermarket devices that can do it too, not sure how pricey though.

    for 5th Gen Toyota has finally improved this, but for earlier gens this how it is.

    The simplest fix would be to pick one set of wheels to be registered, forget about the other set. Maybe the regular all-season set, since they’re used more?
     
  3. sylvaing

    sylvaing Senior Member

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    Thanks. I'll see with my Toyota dealer how much they charge. I was unable to find a working OBD2 to USB adapter compatible with a leaked version of Techstream :(
     
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  4. fuzzy1

    fuzzy1 Senior Member

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    By any chance, might the winter wheel set be stored close enough to the car to be picked up by the TPMS system? If so, then the car might be detecting them, deciding everything is fine, then doesn't have time to trigger the 'missing sensor' warning on short trip segments. No warnings are issued until a significant amount of time since a sensor was last detected, or since ignition was turned on, the timer resets every time the vehicle is turned off. When I swap seasonal wheel sets and forget to reprogram, my other vehicle (not a Toyota) can get five traffic lights and about ten miles down the road before the warning is triggered. Repeated short errands will never trigger it.

    Though this scenario also depends on the car being turned on long enough while near the stored wheels to pick up a ping from each wheel sensor, which might a tight constraint if you don't have any meaningful idle there.
     
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  5. sylvaing

    sylvaing Senior Member

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    I just called my local Toyota dealer. They charge $64 to just reprogram the TPMS sensor! At twice a year, might be worth to look again at alternatives.

    Anybody got a working OBD2 to USB cable? Do you have a link to that specific one? I bought one last winter off Amazon that wasn't communicating so I returned it. Eery to buy one through eBay in case it also doesn't work and stuck with it and many web sites discussing these have dead links.
     
  6. fuzzy1

    fuzzy1 Senior Member

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    Try a tire shop instead, they are likely cheaper.

    I bought a pair of ATEQ TPMS tools after acquiring a second household car with TPMS a decade ago. Not cheap, it took some years to swapping seasonal sets on both for the savings to pay for the devices, but am long past that point now. There should be newer / better / cheaper devices on the market now.
     
  7. sylvaing

    sylvaing Senior Member

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    Yeah. I'll call my usual mechanic shop, they're always busy and can't get a appointment for at least a week or two away, but I'm in no rush. Since Carista gives and can set the sensor ID, once they're reprogrammed, I'll record their ID (I already recorded those it sees right now) so I can set them back when I change wheels. The hell with this stealership.
     
  8. sylvaing

    sylvaing Senior Member

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    So, my go to mechanic shop told me to go to the dealership since they'll charge me 0.5 hour of work and will come out more expensive than the dealership.

    I had my appointment this morning. Cost was for 0.4 hours (so less than my mechanic, not sure about the hourly rate though at my mechanic, I haven't been there for over a year). Now that I have the new sensors, I can unsubscribe to Carista until next fall.

    Screenshot_20240527-140049.png

    Anybody knows offhand which sensor is on which wheel? They are numbered so they must be associated to a wheel location.
     
  9. fuzzy1

    fuzzy1 Senior Member

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    South of the border, tire shops are usually less expensive for this work than either of those choices.
     
  10. sylvaing

    sylvaing Senior Member

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    I prefer not having to deal with appointments. $14 for Carista for a month isn't bad either.
     
  11. rjparker

    rjparker Tu Humilde Sirviente

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    They are not associated to a wheel location on this gen.

    prius tpms 2023-09-18.jpeg

    When the tires are rotated the sensors move but their ID number stays the same. To determine where a sensor is you can monitor the TPMS data and reduce air pressure in one tire. It will report on a drop regardless if driving or not.

    A decent tire shop will have a rf reader to pickup ids per wheel directly while in the shop. Probably a 5 minute job. Many mechanics don’t have the rf tool and would have to break the beads on each tire to access.

    A better solution to TPMS for two sets of tires is to get cloneable sensors next time you have to buy sensors. They can be set with the same ids as the other set of tires.

    The mini-vci adapter is unlikely to be your Techstream problem. The adapter needs a software driver properly installed on your pc to work. The hacked Techstream program also needs pc registry changes to function. Usually both are included on a cd or download but the instructions are poor. The hacked Techstream does not come with a full function install/setup program.
     
    #11 rjparker, May 27, 2024
    Last edited: May 27, 2024
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  12. sylvaing

    sylvaing Senior Member

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    That makes total sense. I should have thought of that lol. I guess unless having a RF reader, the easiest way is to deflate three tires, one at a time and see which one shows a low pressure, last one is the one not deflated. Then it's to keep track where each tire is and update at rotation and winter/summer rotation time.
     
  13. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    When we got our snow tire set (November 2010), the dealership mechanic asked if I wanted the sensors, while shaking his head...

    I didn't need his hints, declined them. Problem solved. :)
     
  14. sylvaing

    sylvaing Senior Member

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    Thing is, without TPMS, you could roll on a flat tire (especially in a rear wheel since it's less evident than the front) until it's too damaged and without a spare, you're dead in place until a tow truck arrives. It happened once with my Honda Odyssey. I noticed I had a flat buy the noise the now destroyed tire was making.
     
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  15. captqc

    captqc Member

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    When I got separate snow tires mounted on new wheels and new sensors I went to two different tire shops and neither could make the tpms light go away. I ended up getting one of these:
    IMG_0856.jpeg
    worked first time I tried it.
     
  16. captqc

    captqc Member

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    BYW: I bought it off Facebook marketplace for $75.
     
  17. sylvaing

    sylvaing Senior Member

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    Hmm, $249 at Princess Auto (Canadian Harbor Freight).

    Would break even after 9 years compared to $14 Carista. I would probably have no use for it beside this car. Even my old 2009 Mazda 6 didn't complain when I swapped wheels with TPMS. It's stupid that Toyota up until Gen5 forced this.

    Best Marketplace price is $150 but that's 500 km away... You got a good deal at $75.
     
  18. captqc

    captqc Member

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    Yup, even a blind pig can get a truffle once in awhile.
     
  19. fuzzy1

    fuzzy1 Senior Member

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    He is part of the old geezer generation where we learned how to detect and deal with flats without TPMS or cell phones, both of which had not yet been invented.

    And his car does have a spare. Which was also a selection criteria for my new PHEV.
     
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  20. sylvaing

    sylvaing Senior Member

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    Yeah, it's easy to detect a flat on the front wheels as it pulls but rear wheel, not so much. By the time it makes a sound, it's too late. Of course, for city driving, with the often ins&outs, it's much easier (I even warn drivers that they have a low pressure tires when I can), but on the highway (like it happened with my Odyssey), not do much.

    The only issue I have is potholes destroying the tires, which had happened twice in my 45 years of driving (yeah, I'm part of the old geezer generation too).