I just hung up with Tire Rack. I definitely got bad information from the first rep. 35 psi is recommended for the Blizzaks too.
TPMS Sensors not recognizing after OEM OT wheel swap (1 Viewer)
- Thread starter Roman
- Start date
Re-reading your post, it seems like your snow tires were already functional for a period before you tried re-learning them.
Note that tire rotations do not require a full relearn. There is a dedicated button in the infotainment for rotations, and you must follow the same "wait at least 15 minutes with the vehicle fully off and undisturbed before clicking the button, put the car into Drive, click the tire rotation button, and drive at least 25mph with occasional left and right turns" procedure as I described. Since your tires were learned at such overinflated pressures, you may also have to reset the learned tire pressures as well, from the same menu (or just enter 35psi numerically through that same menu).
Note that tire rotations do not require a full relearn. There is a dedicated button in the infotainment for rotations, and you must follow the same "wait at least 15 minutes with the vehicle fully off and undisturbed before clicking the button, put the car into Drive, click the tire rotation button, and drive at least 25mph with occasional left and right turns" procedure as I described. Since your tires were learned at such overinflated pressures, you may also have to reset the learned tire pressures as well, from the same menu (or just enter 35psi numerically through that same menu).
While trolling through the NHTSA website, because I will do anything to procrastinate, I found an article which may explain some of the difficulty people have had with pairing aftermarket TPMS sensors: https://static.nhtsa.gov/odi/tsbs/2025/MC-11020661-0001.pdf
It appears the GX and UX have a new generation of TPMS sensors which send information via a new, faster radio signaling protocol, which transmits information in significantly shorter bursts than before - .3ms of transmission every 30ms, or 30ms of transmission every 1 second if the vehicle is not being driven, according to the doc.
I don't know if this protocol is compatible with previous generation TPMS transmissions or if the GX will accept previous generation TPMS signals. But member jpto does claim to have paired aftermarket BH Sens TPMS sensors, so that's at least one point of information.
Given this notice only applies to 24-25 GX550s and 25 UX300Hs, I would guess the aftermarket hasn't had time to update its line of non-programmable sensors or their database of programmable protocols yet. It's possible this is why aftermarket TPMS sensors are so difficult to reliably pair with the GX.
Interestingly, the 2025 Land Cruiser 250 does not seem to have a matching TSB logged with NHTSA, so we may be the first guinea pigs to have these next generation TPMS sensors.
It appears the GX and UX have a new generation of TPMS sensors which send information via a new, faster radio signaling protocol, which transmits information in significantly shorter bursts than before - .3ms of transmission every 30ms, or 30ms of transmission every 1 second if the vehicle is not being driven, according to the doc.
I don't know if this protocol is compatible with previous generation TPMS transmissions or if the GX will accept previous generation TPMS signals. But member jpto does claim to have paired aftermarket BH Sens TPMS sensors, so that's at least one point of information.
Given this notice only applies to 24-25 GX550s and 25 UX300Hs, I would guess the aftermarket hasn't had time to update its line of non-programmable sensors or their database of programmable protocols yet. It's possible this is why aftermarket TPMS sensors are so difficult to reliably pair with the GX.
Interestingly, the 2025 Land Cruiser 250 does not seem to have a matching TSB logged with NHTSA, so we may be the first guinea pigs to have these next generation TPMS sensors.
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That's me - aftermarket sensors work but I think a lot of people aren't programming the sensor id's directly into the car's computer using a scan tool or TPMS specific tool. OBD programming works immediately and the total procedure takes under a minute after plugging the tool in.
The relearn procedure can fail pretty easily if you other sensors nearby when you start up your car, a pretty common scenario when you have your summer set or another Toyota/Lexus parked in your garage.
Also not 100% sure but I think computer doesn't like it if you change 4 sensors and leave the OEM spare on, I think the relearn will fail if it identifies one sensor id that is already programmed in the system.
I plan on installing aftermarket wheels and tires and TPMS sensors and leaving the original sensor in the spare. My snow tires will stay mounted on the OEM Lexus wheels. Are you telling me that as long as the spare has the sensor that was programmed with the OEM wheels, I can't program the new sensors? Can I delete the spare sensor from the system and start over each time I change from my snow tires to my summer wheels and tires?
If you have a tool you can reprogram any sensor id to any position so your plan should work.
I think people run into trouble when they try to relearn with the original spare on or have the old set/another Toyota/Lexus car parked close by.
I can confirm that as long as you're registering a second set of wheels with Genuine TPMS sensors, rather than trying to overwrite an existing set, the GX will be fine with having your factory spare tire with its TPMS sensor. I was able to quickly & easily learn 4 new Genuine Toyota TPMS sensors and my factory spare through the infotainment. I guess we'll see what happens when I swap my spare for a different tire next winter.
My set of factory wheels & sensors are also sitting right next to the GX in my garage, but I made sure to back out pretty far away before starting the learning procedure.
It's also possible that the GX will refuse to learn a combination of Genuine TPMS sensors w/ the new radio protocol + aftermarket sensors with the old protocol, but I don't have personal experience in that area. High quality aftermarket sensors usually match the factory signaling protocol pretty exactly, so as long as they're all compatible, they should learn no problem.
I've been procrastinating installing GTS+, so I have no means of programming TPMS sensors via scantool, but I believe you that it's significantly more reliable. My dealer was even kind enough to give me a list of the TPMS Sensor IDs when they installed my sensors.
My set of factory wheels & sensors are also sitting right next to the GX in my garage, but I made sure to back out pretty far away before starting the learning procedure.
It's also possible that the GX will refuse to learn a combination of Genuine TPMS sensors w/ the new radio protocol + aftermarket sensors with the old protocol, but I don't have personal experience in that area. High quality aftermarket sensors usually match the factory signaling protocol pretty exactly, so as long as they're all compatible, they should learn no problem.
I've been procrastinating installing GTS+, so I have no means of programming TPMS sensors via scantool, but I believe you that it's significantly more reliable. My dealer was even kind enough to give me a list of the TPMS Sensor IDs when they installed my sensors.
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Sounds like it would be good to have the reprogram tool. Do have a suggestion on which one to get?
I have an Autel MaxiTPMS TS501 Pro and a Creader Elite 2.0.
You only need the Autel MaxiTPMS if you're just doing TPMS sensors but I find the Creader scantool faster when I just rotate my tires and it's handy for other DIY tasks.
I kept my spare OEM TPMS and changed out the 4 working tires TPMS. i had no issues with the relearn process. I have a 2024 GX
I've recently put 35x12.5" tyres on my GX550, and removed the spare as I can't fit a 35" in the spare location so no point lugging around the extra weight. The car is throwing the TPMS code, I think this is due to removing the spare it's not recognizing the 5th sensor? Does anyone know if the TPMS system definitely needs the 5th spare wheel sensor to work correctly?
If 5 wheels are registered, this vehicle will definitely throw an error if any one of the wheels is missing, including the spare. Taking out my spare definitely caused a TPMS error and caused the infotainment to stop showing any tire pressures.
I've never tried to register just 4 wheels with no spare, but I believe other Toyotas have the option to register 4 or 5 wheels, and when only 4 wheels are registered, a missing spare does not throw an error (because it doesn't know anything is missing). Perhaps the GX is capable of this too, but it may need a TPMS tool or GTS+ dealer software.
I've never tried to register just 4 wheels with no spare, but I believe other Toyotas have the option to register 4 or 5 wheels, and when only 4 wheels are registered, a missing spare does not throw an error (because it doesn't know anything is missing). Perhaps the GX is capable of this too, but it may need a TPMS tool or GTS+ dealer software.
Thank you mate appreciate it. I might just put the spare back on... it's a huge (and noticeable) weight saving though so we'll see. Will chat to the dealer about it also to see if they can reprogram it
I have tried and tried to reset my TPMS system without success. Starting the tire rotation process made the TPMS failure method inactive, but the system still hasn't recognized the position of the wheels and cannot record the tire pressure which I lowered to 35 psi. I have a Creader elite 2.0 arriving Sunday, so I'll try resetting with that. I really don't want to go back to the dealer, they seemed stumped at my last visit.
I had the error. Took my car into the dealership for the rear camera fix and they reset it for me.
Success!!! I got the Westcott preload collars and Toyo Open Country 12.5 x 35 tires on Black Rhino 17” wheels in Space Grey installed. Used new TPMS sensors from Lexus and kept the original sensor in the spare underneath. I registered these as “Set 2” with no problems. I’m going to run 27 psi in these tires and will reset the system using “current pressure”.
My problem with the snow tires I put on the original wheels turned out to be a broken sensor.
My problem with the snow tires I put on the original wheels turned out to be a broken sensor.
📷 Lexus GX 550 Random Images
📷 Lexus GX 550 Random Images
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