Reset Tire Pressure Monitor?

mrichione · 09-30-2021, 11:46 AM

I have a persisting Low Tire Pressure warning on my iDrive, despite all tires being properly inflated to the recommended pressure. They were indeed low, prompting me to refill, but ever since the message has persisted. When I click into the TPM menu, the proper pressures are shown and the tires are green, but the yellow warning indicator for low pressure still is present. I've tried resetting iDrive to no avail. There used to be a manual TPM Reset function in iDrive but I cannot locate it in any menu.

Any ideas?

denaliman · 09-30-2021, 12:14 PM

Are your tires set to the correct size and speed in the menu? Try changing it then changing it back to the correct settings.

nZtiZia · 09-30-2021, 12:36 PM

mrichione I also noticed the missing 'Reset' selection on ID7 (been driving bimmers since 2008). what we have to do now is go into TPMS menu and select "Tire settings" despite the manual stating OTW. kinda annoying…

when you back out of the menu, iDrive will tell you to drive off so it can read the new pressures. others may tell you the notification should simply disappear after topping up, but that's not what I've experienced.

jad03060 · 09-30-2021, 05:17 PM

Once you have inflated the tires to the proper levels, you MUST tell the system to run a TPMS reset. It uses that value obtained during the reset as the 'correct' base value, and will issue an error message when the pressure gets below that by a predetermined amount. So, if the pressure in the tires was higher when they were last reset (not uncommon when shipped from the factory), just lowering them to the proper value doesn't reset that baseline value, so the computer now thinks they are too soft. Now, if you have a slow leak, and then add some air back to the proper value, you should not need to reset that baseline pressure value again (but might want to look into why the pressure dropped!). Only when moving a tire, or swapping locations, or deciding to change the baseline pressure you want to monitor, do you have to reset the TPMS again.

It's not uncommon to get that error message if they're a little low, and then, after driving and heating the tire up, the pressure goes up, and the warning goes away.

The option to reset is in the last OTA update I got (3.21.xx), and needs to be there. Resetting iDrive does not reset the base value of the TPMS pressure.

nZtiZia · 09-30-2021, 06:50 PM

Quote:

Originally Posted by jad03060

1) Once you have inflated the tires to the proper levels, you MUST tell the system to run a TPMS reset.
[…]
2) Only when moving a tire, or swapping locations, or deciding to change the baseline pressure you want to monitor, do you have to reset the TPMS again.
[…]
The option to reset is in the last OTA update I got (3.21.xx), and needs to be there.

this is confusing. which one is it? 1 or 2? (this topic has come up before, but answers aren't consistent.) the OP just topped them up, so according to #1, he needs to reset, and topping up didn't fit #2, but he still had to reset, so???

I'm on 03/2021.50 and there isn't a selection to reset. please show us a photo on yours.

jad03060 · 09-30-2021, 07:51 PM

If your TPMS says there is an error (which you indicated was true), and you have the proper pressure in them now, you MUST do a reset. If you move or substitute new, or decide you want a new 'normal' pressure, you must also then do a reset. So, for your situation is it both 1 and 2. Normally, only 2.

For whatever reason, the menu changed. When on the TPMS status page, AFTER you've got everything where you want it (right pressures and tire type), tell it to SAVE SETTINGS. If you then look at it, it will say resetting TPMS regardless of not changing any of the menu options. To get that done, you have to drive the vehicle some so it can reverify what TPMS are installed and where they are installed, and that takes a bit of time as they only broadcast about once every 30-seconds, and it's looking for changes in rotation rates to identify where each tire is located on the chassis (only one receiver, not one at each wheel). It's using the rotation rates and distance traveled from the ABS, and eventually figures out which wheel is where based on their different paths as you go around curves/corners where each tire takes a different path. It'll take a lot longer if the road is ruler straight. Circle a block and it should go faster.

FWIW, you have to do this while in the READY state.

09-30-2021, 11:46 AM	#1
mrichione Private First Class 96 Rep 158 Posts Drives: BMW X5 Join Date: Feb 2019 Location: USA iTrader: (0)	Reset Tire Pressure Monitor? I have a persisting Low Tire Pressure warning on my iDrive, despite all tires being properly inflated to the recommended pressure. They were indeed low, prompting me to refill, but ever since the message has persisted. When I click into the TPM menu, the proper pressures are shown and the tires are green, but the yellow warning indicator for low pressure still is present. I've tried resetting iDrive to no avail. There used to be a manual TPM Reset function in iDrive but I cannot locate it in any menu. Any ideas?
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09-30-2021, 12:14 PM	#2
denaliman Major 478 Rep 1,298 Posts Drives: 2021 BMW X6M Competition Join Date: Oct 2012 Location: Ontario, Canada iTrader: (0) Garage List 2013 X6M [0.00]	Are your tires set to the correct size and speed in the menu? Try changing it then changing it back to the correct settings. __________________ _____________________________________ 2021 X6M Competition, 2021 Audi SQ5 Technik, 2013 Audi S4
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09-30-2021, 12:36 PM	#3
nZtiZia Major General 4715 Rep 8,776 Posts Drives: eVeRyOnE mAD! Join Date: Dec 2020 Location: neither here nor there... iTrader: (0) Garage List 2021 BMW X5 xDrive 45e [9.88]	mrichione I also noticed the missing 'Reset' selection on ID7 (been driving bimmers since 2008). what we have to do now is go into TPMS menu and select "Tire settings" despite the manual stating OTW. kinda annoying… when you back out of the menu, iDrive will tell you to drive off so it can read the new pressures. others may tell you the notification should simply disappear after topping up, but that's not what I've experienced. Attached Images Last edited by nZtiZia; 09-30-2021 at 07:34 PM..
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09-30-2021, 05:17 PM	#4
jad03060 Major General 3209 Rep 6,881 Posts Drives: X5 45e Join Date: Aug 2018 Location: NH iTrader: (0)	Once you have inflated the tires to the proper levels, you MUST tell the system to run a TPMS reset. It uses that value obtained during the reset as the 'correct' base value, and will issue an error message when the pressure gets below that by a predetermined amount. So, if the pressure in the tires was higher when they were last reset (not uncommon when shipped from the factory), just lowering them to the proper value doesn't reset that baseline value, so the computer now thinks they are too soft. Now, if you have a slow leak, and then add some air back to the proper value, you should not need to reset that baseline pressure value again (but might want to look into why the pressure dropped!). Only when moving a tire, or swapping locations, or deciding to change the baseline pressure you want to monitor, do you have to reset the TPMS again. It's not uncommon to get that error message if they're a little low, and then, after driving and heating the tire up, the pressure goes up, and the warning goes away. The option to reset is in the last OTA update I got (3.21.xx), and needs to be there. Resetting iDrive does not reset the base value of the TPMS pressure.
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09-30-2021, 07:51 PM	#6
jad03060 Major General 3209 Rep 6,881 Posts Drives: X5 45e Join Date: Aug 2018 Location: NH iTrader: (0)	If your TPMS says there is an error (which you indicated was true), and you have the proper pressure in them now, you MUST do a reset. If you move or substitute new, or decide you want a new 'normal' pressure, you must also then do a reset. So, for your situation is it both 1 and 2. Normally, only 2. For whatever reason, the menu changed. When on the TPMS status page, AFTER you've got everything where you want it (right pressures and tire type), tell it to SAVE SETTINGS. If you then look at it, it will say resetting TPMS regardless of not changing any of the menu options. To get that done, you have to drive the vehicle some so it can reverify what TPMS are installed and where they are installed, and that takes a bit of time as they only broadcast about once every 30-seconds, and it's looking for changes in rotation rates to identify where each tire is located on the chassis (only one receiver, not one at each wheel). It's using the rotation rates and distance traveled from the ABS, and eventually figures out which wheel is where based on their different paths as you go around curves/corners where each tire takes a different path. It'll take a lot longer if the road is ruler straight. Circle a block and it should go faster. FWIW, you have to do this while in the READY state.
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