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Tire pressure app does not report

Max*

Charging
Apr 8, 2015
6,670
3,719
NoVa
When I display the Tire Presuure app, I get

- - psi

for all 4 tires. No numbers. Do I need to turn this feature on?

I have a 1-month old P90D.

After I updated, I had --psi also, a quick spin later, and next time I stopped I had the real readings.
 

Johan

Ex got M3 in the divorce, waiting for EU Model Y!
Feb 9, 2012
7,495
9,770
Drammen, Norway
The sensors in the tires don't have (perpetual) batteries but they get their energy from the wheel spinning (like wrist watches that "wind up" from daily use i.e. arm movements). When the car sits still they have no juice. As you drive a little they get powered up and start transmitting data wirelessly.
 

araxara

S-P85#3,218 X-LR M3AWD
May 11, 2012
1,016
381
Tucson, AZ
The sensors in the tires don't have (perpetual) batteries but they get their energy from the wheel spinning (like wrist watches that "wind up" from daily use i.e. arm movements). When the car sits still they have no juice. As you drive a little they get powered up and start transmitting data wirelessly.
Actually, that not quite true. TPMS sensor do have batteries and generally can last 3-5 years. The sensor do go to sleep when not in motion to conserve battery power. I’ve had several TPMS sensors on my Tesla replaced because the battery level was low.
 

russman

Member
Nov 12, 2013
394
48
California
Where is the individual tire pressure display? I have a 2014 S85 non-auto pilot hardware. This was one of the things I was looking forward to with 7.0 with no AP.... :(
 

Johan

Ex got M3 in the divorce, waiting for EU Model Y!
Feb 9, 2012
7,495
9,770
Drammen, Norway
Actually, that not quite true. TPMS sensor do have batteries and generally can last 3-5 years. The sensor do go to sleep when not in motion to conserve battery power. I’ve had several TPMS sensors on my Tesla replaced because the battery level was low.

I. Did. Not. Know. That. (Obviously).

Thanks for schooling me and thanks for being so polite about it. "Not quite true"... I was dead wrong.
 

Cyclone

Cyclonic Member ((.oO))
Jan 12, 2015
5,058
1,143
Charlotte, NC
I. Did. Not. Know. That. (Obviously).

Thanks for schooling me and thanks for being so polite about it. "Not quite true"... I was dead wrong.

No, but a reasonable assertion from surface observations. Same net effect - when the car has been sitting, the sensors aren't transmitting to the car.
 

FlatSix911

Porsche 918 Hybrid
Jun 15, 2015
6,652
6,113
Silicon Valley
Just downloaded 7.0 ... here are the release notes on the tire pressure app.


View attachment 98149

attachment.php?attachmentid=98149.jpg
 
Last edited:

JPP

Active Member
Feb 4, 2013
3,060
1,287
SF Bay Area, CA
Where is the individual tire pressure display? I have a 2014 S85 non-auto pilot hardware. This was one of the things I was looking forward to with 7.0 with no AP.... :(

...not sure when TM switched to a different TPMS system, but older builds don't provide the data for the current implementation of the TPMS display on the instrument panel (...my S85 does not). Glad I have FOBO Plus.
 

Dchint

Member
Jun 4, 2013
63
0
WS, IL
...not sure when TM switched to a different TPMS system, but older builds don't provide the data for the current implementation of the TPMS display on the instrument panel (...my S85 does not). Glad I have FOBO Plus.

So does your wife's S display individual tire pressures? Without FOBO?
 

JPP

Active Member
Feb 4, 2013
3,060
1,287
SF Bay Area, CA
So does your wife's S display individual tire pressures? Without FOBO?

Yes, her June 2015 S70D with full autopilot h/w & s/w does display TPMS when I select the Status app, and, FWIW, the pressures are about 1/2 PSI different than the FOBO readings. Still not going to get rid of the FOBO as it is nice to be able to walk by the car and have it read all 4 tires and let me see the data on my iPhone, plus alert me if pressures are outside of the limits/parameters I choose.
 

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