TPMS sensor replaced Costco, loosing air, no leak

Discussion in 'Gen 2 Prius Technical Discussion' started by sachminu, Nov 20, 2018.

  1. sachminu

    sachminu Junior Member

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    Had TPMS sensor replaced at Costco over weekend. Dashboard tire pressure light never went away, by Tuesday tire lost air pressure. Went back, no leak in tire. Realigned sensor. Costco said if light comes on again, go to manufacturer.

    Light came back on today. Tire pressure still ok. Went to dealer, they said $170 to check TPMS communication system.

    Has anyone had this issue? What else could be the problem? It's a 2009 Prius.
    Thanks,
    Cooks.
     
  2. Salamander_King

    Salamander_King Senior Member

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    I hope Costco really programmed TPMS onto car's ECU. I am not sure on Gen2, but for my PRIME, removing OEM tires with TPMS and swapping with winter rim/tire set without TPMS did not immediately trigger the warning lights to come on. It actually took over 40 miles of driving around. It is possible Costco installed TPMS but never completed re-learning process to register new IDs into ECU. Are they aftermarket TPMS or OEM?

    Have not had the TPMS problem with Prius yet, but on my old Civic, I have had numerous TPMS errors starting at when car was 7 years old. After spending closed to $900 and 7 TPMS failures in just 3 years, I finally gave up. I replaced 5 TPMS (4 OEM and 1 aftermarket) and currently have 2 failed TPMS on the car. The car now has permanent TPMS warning light lit on the dash. I just use ~$50 external TPMS to monitor the individual tire pressure on this car.
     
  3. wjtracy

    wjtracy Senior Member

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    Sounds like the COSTCO guy did something wrong. We are expecting your car works fine but he messed up putting codes in or something.

    How did you know which tire TPMS sesnor was bad?
     
  4. Skibob

    Skibob Senior Member

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    Has the tire actually lost pressure verified with a pressure gauge?
     
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  5. JC91006

    JC91006 Senior Member

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    You probably have a really dirty rim, possibly with lots of dirt on it. When the tire was installed, there was probably a bad seal on the beads. You can verify by putting the tire in water and wait for an air bubble.

    To remedy, remove tire, clean the rim and remount tire
     
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  6. exstudent

    exstudent Senior Member

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    I believe most tire places use cloneable TPMS so they don't have to mess w/ registering the new TPMS ID into the car's computer. But the battery is dead? For ID cloning, the dead TPMS does not have enough energy to relay the air pressure data. But for cloning purposes, there might be enough energy to get the ID.

    Was the tire light on before pulling into Costco?
    How was it determined that TPMS was dead prior to replacement?
    The tire light remained ON after TPMS was replaced at Costco?


    This makes no sense: How can the tire loose pressure, yet have NO leak????
    Who determined the tire was "magically" loosing air? Loosing air must have a leak.
    Was the tire submerged in water (sections at a time) to look for air bubbles?

    What was the PSI when you left Costco? What was the approximate ambient air temp at the time?

    What was the PSI on Tuseday? Were the tires checked shortly after being driven? ("hot tires") What was the approximate ambient air temp at this time?


    This implies one or two possibilities, which is it?
    1) You supplied the TPMS sensors and had Costco install it. Is this the case? If so, Costco meant for you to contact the TPMS manufacture.
    2) If Costco supplied the TPMS sensors, then they meant for you to goto Toyota.

    You could get Techstream (official diagnostic software written for Toyota/Lexus, and used at Toyota/Lexus service depts) from Amazon ($25+) and diagnosis this yourself to see if the car sees all four TPMS. Easiest to install on an obsolete laptop running Windows 32bit OS (XP/Vista/7); Mac install possible just search Internet. Ask friends/family in IT for their obsolete laptops laying around.
     
  7. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    I'm thinking he means the valve is leaking? That could be checked with a little soapy water, fwiw.
     
  8. sachminu

    sachminu Junior Member

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    Hello, everyone, thanks for the replies. So had the tire checked again at Pep Boys over thanksgiving weekend. They couldnt find leak. Once tire pressure adjusted, light went off. But again tire kept losing pressure, slowly every 2-3 days, light would come back on. Took car to dealer yesterday, they found a small hole in tire between the threads!! They patched it up and so far, no leaks, no tire pressure loss and no light.

    Not sure what Costco /Pepboys did, they both couldnt find the leak. I am assuming it had nothing to do with the sensor. The tire had a leak!! thats why losing pressure. Or the sensor was calibrating and this hole was another issue which happened coincidentally just after I replaced the sensor.

    Dealer also replaced all the stem valve caps, which were missing and also fixed two recalls for me (the electric battery water heater and the steering wheel shaft).

    To answer previous questions:

    1) Was the tire light on before pulling into Costco? - yes tire light was on, tire was flat, so replaced with spare tire, went to costco
    2) How was it determined that TPMS was dead prior to replacement? - costco, couldnt find leaks in tire, assumed that I have a dead sensor, since light was on...replaced sensor for me.
    3) The tire light remained ON after TPMS was replaced at Costco? - yes light remained on after sensor replaced, costco said thats normal , will go away after a day. That didnt happen, so went back to Costco, since tire again losing air pressure. They readjusted the sensor, and said if light comes back go to dealer.
    4) Ambient air temperature: It was cold, around 30F...pepboys said its normal for tire to lose pressure and for light to come on when its cold...it was cold for a few days at 30F, then back to 40-50F

    Light went away after driving away from Costco. But next day light came on, the day after, tire lost pressure, can see visually also measured with gauge, tire lost pressure and next day almost flat, light still on. This was all over thanksgiving weekend. Took,to pep boys, they checked, no leak. Again light went away. Tire looses pressure, light comes back on...took to dealer yesterday and they put tire in water to look for air bubbles and found leak.

    5) Was the tire submerged in water (sections at a time) to look for air bubbles? - Dealer did that, found leak. I am assuming Costco and pepboys did not do that, they maybe must have just did a visual inspection, since it was busy and over the holidays.

    Anyway will be going back to Costco, and have them refund me for sensor or at least what the dealer charged me $55 for patch. Since I have tire warranty with Costco/ Michelin tires!!

    thanks everyone!
     
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  9. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    I've gotten into a habit of always removing valve caps whenever I hand the car, or loose rims, over to a tire shop. So I've got spares, or to replace the goofy green ones Costco puts on.
     
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  10. Raytheeagle

    Raytheeagle Senior Member

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    Goofy :ROFLMAO::LOL::ROFLMAO::LOL::

    https://goo.gl/images/rJ9UGb

    We’re at the Happiest Place on Earth now and will be eating at his kitchen later this week:).

    But how else will you know you have nitrogen in your tires without those wonderful green caps:whistle:?
     
  11. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    That nitrogen fill gets diluted pretty quick. :rolleyes:
     
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  12. Raytheeagle

    Raytheeagle Senior Member

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    Given air is already 80% nitrogen, it ain’t that much different anyway ;).
     
  13. Skibob

    Skibob Senior Member

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    If you get Techstream you will be able to tell if you have a bad TPMS. The pressure and temperature for each tire is shown on the screen. I currently have 2 bad ones on my 2006 but I’m going to wait until I get new tires to replace them.
     
  14. wjtracy

    wjtracy Senior Member

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    Hopefully you have better luck than me...my installer charged me $30 per tire labor to install TPMS whether I am putting on a new tires or not. But yeah I finally got 4 new TPMS here at 12-yrs. I had one go bad at 9.5 years and the others lasted about 12 years. I bought the replacement Denso TPMS units on Amazon myself.
     
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  15. Kevin_Denver

    Kevin_Denver Active Member

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    Just as a side comment - service at Pep Boys in my experience has generally been terrible. I once took a car for an oil change and afterwards found two bolts missing from the air intake box (they always pull the air filter out to try to get you to pay $20 to replace it). Have also found tires aired up to different pressures and oil overfilled. It depends on your area and specific shops, but Discount Tire and Goodyear have better service for tires generally.
     
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