TPMS IN COLD WEATHER

[stugray]

Nitrogen filed tires helps in only one way.

It purges the tire of any moisture.
If you have moisture in the tire, temperature changes result in less predictable pressure changes.
That is the ONLY benefit as "air" is about 70% nitrogen already....

[humfrz]

[quote=Clembo;1281302]

Originally Posted by humfrz

Ahhhhhh............yep, whatever happened to ...... oh, never mind .....

Being older too l know what you're thinking...

Hey @Clembo, I see you are from SE CT. I lived in Newtown and worked in Westport for several years. You live anywhere around there .... ??

humfrz

[DSlayerZX]

it's interesting, because my co-worker's 2012 Camry is able to display the pressure read out of each individual tire on his car... while the FR-S can't.

[Jertronic]

Originally Posted by Ozzman

You don't lose air when the temp drops. The air in your tires loses energy. All the air molecules vibrating around inside a tire is essentially what creates the pressure. As the temperature drops, the molecules vibrate less thus exerting less pressure on the tire.

+++ The northeast has experienced a ridiculously mild fall. No TPMS warnings yet. This post just reminded me to check my pressures tomorrow morning.

[Suberman]

Originally Posted by Mikem53

It's not a useless system. I enjoyed having it in my corvette where you were able to display the psi reading for each tire. The scions half assed version is not near as useful since it's basically an idiot light warning, even though you can see each individual tire pressure via techstream. Toyota chose to cheap out on our system. It however helps the clueless ones who wouldn't notice low air or a flat tire because they are too busy talking on their phones..

If your TPMS displays real time pressure it isn't useless. It would be pretty nice if it would also display real time tire temperature as well, which it could do.

Only the idiot light TPMS are dangerously useless.

[Suberman]

Originally Posted by Porsche

Sure it does, although not much. The generally quoted figure is one psi per month pressure loss. Not much, to be sure, but it contributes to the overall reduction in tire pressure over time if one's tires are left unattended over long periods, as so many are.

I have had tires maintain pressure for several months or even longer.

[Suberman]

Originally Posted by stugray

Nitrogen filed tires helps in only one way.

It purges the tire of any moisture.
If you have moisture in the tire, temperature changes result in less predictable pressure changes.
That is the ONLY benefit as "air" is about 70% nitrogen already....

Nearly 80% actually, and fortunately as 30% Oxygen would lead to interesting problems.

Otherwise you are correct that keeping water vapour out of your tires is a good idea.

[thill]

It was in the low 30's this morning when I left the house. No TPMS issues for me....

[wparsons]

It's been covered, but still...

These aren't TMPS issues, this is the system telling you that your tire pressures have dropped with the colder weather.

As for nitrogen, of course the dealership will tell you that. They want you coming to them for everything, MUCH easier to upsell you on things when you're there more often.

[Scionshaun]

Originally Posted by Scionshaun

anyone ever had their tpms light come on in cold weather?

I took my car back to the dealer and they said this is the cause of cold temperature drops. I had them take the air out of the tires and fill them up with nitrogen which doesn't expand during rapid temp dips for about $24 all around. You may want to invest in the nitrogen for all around.

[Jertronic]

Nitrogen is something that I have never once seen offered at any shop or dealership. Is this used more for racing or for climates with rapid temperature changes? I wouldn't mind trying some nitrogen once.

[Suberman]

Originally Posted by Scionshaun

I took my car back to the dealer and they said this is the cause of cold temperature drops. I had them take the air out of the tires and fill them up with nitrogen which doesn't expand during rapid temp dips for about $24 all around. You may want to invest in the nitrogen for all around.

Nitrogen expands and contracts with temperature in exactly the same way as air or any gas. It's called Boyle's Law.

Ordinary air is 80% nitrogen.

[Rayme]

Originally Posted by Suberman

If your TPMS displays real time pressure it isn't useless. It would be pretty nice if it would also display real time tire temperature as well, which it could do.

Only the idiot light TPMS are dangerously useless.

I check my tire pressure all the time but saying the idiot light is useless isn't true, every bit of information is good to have. If you get a tire puncture on the highway you'll have enough time in some case to pull over before running out of air. But I also hate them because they are useless in the winter since the sensors stay in my summer wheels lol

[sklimo]

[quote=humfrz;1281869]

Originally Posted by Clembo

Hey @Clembo, I see you are from SE CT. I lived in Newtown and worked in Westport for several years. You live anywhere around there .... ??

humfrz

He lives in New London I believe. Where did you work in Westport?? I'm in Norwalk