Cold weather = cause tire to loose pressure?

PNF · 01-15-2009, 04:08 PM

Yesterday my TPMS was warning me I have low tire pressure.. I thought I had a flat or something, but I cannot remember hitting any potholes, unless there are some wheels.

So, I parked my car, and I checked tire pressure in every wheel, and all 4 look good? Then, I reset the TPMS and it still says low tire pressure!

So, I just pumped a little, about 2-3 seconds in each tire, and now, then I reset the TPMS, and no, driving for 2 days, the warning never came back on.

So is it the cold weather causing the tire loose its pressure? or should I get my tires checked out at the dealer, which is really a hassel I try to avoid.

I have OEM A/S RFT on right now, and about 2600 miles on the tire and the car actually.

optimistic · 01-15-2009, 04:24 PM

Yes. This has happened 2x to me, each on very cold days. I'm no science guy, but I think that when air warms, it expands. And when it cools, the opposite happens, and as a result, the pressure inside the tire decreases ---> TPMS warning.

TiAg335i · 01-15-2009, 04:25 PM

This has been discussed countless times.

PV = nRT

Learn it.

PNF · 01-15-2009, 07:41 PM

I did think about the cool/warm air factor, but didnt think it was that cold and enough to trigger the TPMS warning. (after all, we're talking about only low 30s F, not like I am in Minny where its -20 F)

Thanks for the reply

kgb1637 · 01-15-2009, 07:49 PM

Quote:

Originally Posted by TiAg335i

This has been discussed countless times.

PV = nRT

Learn it.

This guy knows science.

John 070 · 01-15-2009, 10:10 PM

Quote:

Originally Posted by TiAg335i

This has been discussed countless times.

PV = nRT

Learn it.

What's scary is that's 11th grade physics. Many don't grasp that, math, or even understand why when air gets into the braking system the car can't stop. Why, there are even people who cannot amortize a mortgage with Excel, let alone a calculator, nor pencil and paper (like our grandparents). Anyway, -1 lb. for -10 F is another way to look at it.

TiAg335i · 01-16-2009, 01:31 PM

Quote:

Originally Posted by John 070

What's scary is that's 11th grade physics. Many don't grasp that, math, or even understand why when air gets into the braking system the car can't stop. Why, there are even people who cannot amortize a mortgage with Excel, let alone a calculator, nor pencil and paper (like our grandparents). Anyway, -1 lb. for -10 F is another way to look at it.

It's general chemistry. Sure in HS they like to lump all "advanced" science material into physics. But take any college level general chemistry course and you will learn the gas laws.

jaysonbmw · 01-16-2009, 02:16 PM

This will help you to stop that over inflatio and under inflation!!

www.getnitrogen.org

01-15-2009, 04:08 PM	#1
PNF Colonel 180 Rep 2,355 Posts Drives: 15' YMB F80 M3 Join Date: Oct 2008 Location: Wayne, PA / Taipei iTrader: (4)	Cold weather = cause tire to loose pressure? Yesterday my TPMS was warning me I have low tire pressure.. I thought I had a flat or something, but I cannot remember hitting any potholes, unless there are some wheels. So, I parked my car, and I checked tire pressure in every wheel, and all 4 look good? Then, I reset the TPMS and it still says low tire pressure! So, I just pumped a little, about 2-3 seconds in each tire, and now, then I reset the TPMS, and no, driving for 2 days, the warning never came back on. So is it the cold weather causing the tire loose its pressure? or should I get my tires checked out at the dealer, which is really a hassel I try to avoid. I have OEM A/S RFT on right now, and about 2600 miles on the tire and the car actually. __________________ 2015 F80 Fully loaded (minus the CCB) YMB M3 / Individual Amaro Brown BBS \| KW \| Vorsteiner \| IND \| Akrapovic \| BMW CF Performance Interior \| Brembo \| Eibach 2008 E92 335i (sold)
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01-15-2009, 04:24 PM	#2
optimistic Private First Class 5 Rep 136 Posts Drives: '07 E92 Join Date: May 2007 Location: Boston, MA iTrader: (0)	Yes. This has happened 2x to me, each on very cold days. I'm no science guy, but I think that when air warms, it expands. And when it cools, the opposite happens, and as a result, the pressure inside the tire decreases ---> TPMS warning. __________________ Now: Monaco Blue/Saddle Brown E90 335i x-Drive \| 6MT \| ZPP \| ZSP \| ZCW \| iDrive \| Logic 7 \| HD Radio \| CA \| Sunshades \| PDC \| iPod Before: Space Gray/Black E92 328xi \| 6MT \| ZPP \| ZSP \| ZCW \| iDrive \| iPod \| Sirius
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01-15-2009, 04:25 PM	#3
TiAg335i Trance Life 344 Rep 4,706 Posts Drives: 2007 E92 335i Join Date: Jan 2007 Location: Long Island, NY iTrader: (4)	This has been discussed countless times. PV = nRT Learn it.
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01-15-2009, 07:41 PM	#4
PNF Colonel 180 Rep 2,355 Posts Drives: 15' YMB F80 M3 Join Date: Oct 2008 Location: Wayne, PA / Taipei iTrader: (4)	I did think about the cool/warm air factor, but didnt think it was that cold and enough to trigger the TPMS warning. (after all, we're talking about only low 30s F, not like I am in Minny where its -20 F) Thanks for the reply __________________ 2015 F80 Fully loaded (minus the CCB) YMB M3 / Individual Amaro Brown BBS \| KW \| Vorsteiner \| IND \| Akrapovic \| BMW CF Performance Interior \| Brembo \| Eibach 2008 E92 335i (sold)
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01-16-2009, 02:16 PM	#8
jaysonbmw F1 9 Rep 226 Posts Drives: Formula 1 E92 Join Date: Apr 2008 Location: PR/Orlando Fl iTrader: (0)	This will help you to stop that over inflatio and under inflation!! www.getnitrogen.org
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