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TPMS question

229 views 20 replies 3 participants last post by  JasonF  
#1 ·
So I recently bought a used 2020 Model 3 LR. At the dealer (not a Tesla dealer) the car had some after market rims that did not match well with the car, in my opinion. So they offered to switch the stock wheels off a 2018 Model 3 they had also for sale. I agreed, stock wheels look so much better with the plastic covers off.
Anyway, ever since there has been a TPMS alarm and the screens says the pressures on each tire have not updated since the wheels were swapped.
I have changed to the correct size rims on the Tesla display. My particular car does not have the TPMS reset on the display.
I have done some reading and can’t tell for sure when the RF to Bluetooth switched on the tire sensors. I’m wondering if thats why mine will not auto-learn?
I do not have a Tesla dealer in town, nearest is 5 hours away. I tried to go to a local shop, but they couldnt get to the TPMS reset with a normal OBD2 scanner.
How do I know if the 2018 even has compatible tire sensors?
 
#4 ·
You may need to check and see if your new wheels actually have TPMS sensors at all. Even if it does, the batteries in the sensors could be dead.

To see if your wheels have bluetooth sensors, you can use your phone!
  • Download and install an app that can do BLE scanning.
  • Drive your car. This is sometimes necessary to "turn on" the TMPS sensors. They generally turn off after the car has been sitting for a while, and activate again when motion is detected.
  • Park somewhere, preferably someplace away from too many other bluetooth devices
  • Run your app and see if it detects 4 similar BLE devices.
 
#10 ·
So I also tried the BLE scanner app, i didnt detect 4 of anything named the same. So I think that confirms no bluetooth sensors. Also the service mode gives me the option to set to continental so I assume this also confirms the car was set to the RF tire sensors before they swapped rims.

So that would agree with the post that they didnt start bluetooth until 2021.
Also the tire shop said with their scanner they could “pickup” all 4 sensors (i assume it scans for RF, the older Tesla system) they didnt know how to get to the Tesla TPMS reset, but you guys cracked the code on how to get to service mode which has the reset.

Just have no idea when i push the reset I get the spinning wheel icon and it never completes the action.
 
#9 · (Edited)
Ok thanks for the info that has been the most hopeful yet. I got into service mode, found the shock absorber, then found the TPMS reset. I tried the reset and I just get the spinning wheel and waiting for task to complete. I waited at least 20 min it never changed. Also the erase id tab when you go into it, shows a lock on the run button, do you have to do this first and if so how do you remove the lock?
Last, this is a stupid question, when you do these operations do you need good wifi? My garage wifi is poor, I have the fiber company coming tomorrow to add a booster.
Thanks again
Randy
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#11 ·
Ok thanks for the info that has been the most hopeful yet. I got into service mode, found the shock absorber, then found the TPMS reset. I tried the reset and I just get the spinning wheel and waiting for task to complete. I waited at least 20 min it never changed. Also the erase id tab when you go into it, shows a lock on the run button, do you have to do this first and if so how do you remove the lock?
Last, this is a stupid question, when you do these operations do you need good wifi? My garage wifi is poor, I have the fiber company coming tomorrow to add a booster.
Doesn't the TPMS Sensor Learn say that you have to drive the car around while it's learning? It might have a speed limiter in Service Mode, so do that in a residential neighborhood or parking lot.
 
#15 ·
So I tried in service mode to press the TPMS reset, remove the speed limiter, still no luck.

Next thing when I’m in service mode and on the TPS screen, it says “Type BLE”, that means bluetooth correct? Why does it say that if this car should be RF sensors? See Pic.
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Next thing I ran the BLE app again to detect if the sensors were bluetooth and there was 4 of the same thing named myqxxxxxsomething, how would I know if thats the tire sensors? I tried in different physical locations and their still there, so assume its coming from the car? see pic
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#17 ·
Next thing when I’m in service mode and on the TPS screen, it says “Type BLE”, that means bluetooth correct? Why does it say that if this car should be RF sensors? See Pic.
Unfortunately, we don't have perfect information. Tesla makes updates to their cars on-the-fly instead of waiting for each model year like traditional automakers.

I have seen some reports that they started switching Model 3s to BLE around October 2020, while others said that they waited until 2021. I guess the former reports were correct?
 
#16 ·
MyQ is a company that makes various electronics. They don't make TPMS AFAIK, so I don't think those are your sensors. They do make garage-door related stuff, and the Tesla can interract with MyQ-enabled garage doors, so those devices might be related to that capability.


So... it sounds like you have RF TPMS but need BLE TPMS.
 
#19 ·
@teslaspark 2017–2023 Model 3 Service Manual | Tesla.

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Those are the two service manual pages about it. It says you need to go at least 15 mph.

The settings page to disable the speed limiter is where you first enter Service Mode, there is a Settings button there.