TPMS and cold weather

I’ve experienced it many times in many models.

It will go away when the tires warm up.

Tonered has adequately explained this at least twice in this thread. Regardless, now watch this smolder over into Friday where it will become a full fledged dumpster fire.

 

Yup. Tacomaworld. Flamethrowers and lack of patience mandatory...

My question wasn’t about cold vs warm tires, I think we all get how that works. God knows there’s enough hot air in TW. Wanted to know if anyone experienced this and if it was normal or bad TPMS.

 

From the owners manual:

When the tire pressure warning system is initialized, the current tire inflation pressure is set as the benchmark pressure.

So if you had different pressures in your tires when the system was initialized (or reset) then you can see a warning for one tire and not another.

In other words the TPMS system will give you a warning when the pressure drops a certain amount below the "benchmark pressure". I don't know what the drop is that causes the warning.

 

Another reason to move to Canada where TPMS is not mandatory and likely not even available as an option on some vehicles. Also, AC OR MT is only available in Canada, yet another reason I like living here.

 

Man, when I go off roading I love the TPMS to be able to keep an eye on air pressure when I'm aired down. Also 29 PSI isn't great for tire life or gas mileage on the road so it's literally doing its job and trying to save OP from other issues. Problems are pretty rare and usually easily and cheaply fixed.

 

This is the correct answer. Whatever the pressure was in each specific tire is what gets programmed into the system. So unless every single tire was at the same pressure when programmed, then it'll alarm at different levels when low.

 

I don’t keep it at 29...that was the cold pressure after a thirty degree drop. Same tire was 34 this afternoon.

 

Just push the reset button and get on with your life.

 

Gratzie!

Stop it!

There's another piece of internetz wisdom, sort of. One of the proper inflation tests besides chalk is the difference between cold inflation and warm while driving. I'm guessing that you are talking mainly about the afternoon temp in general. But as far as heat in a tire, a good pressure is usually about 10% higher, warmed up on your typical roads versus cold. A lot of riders swear by that.

I do it the dumb way and just balance wear and feelz.

 

Thanks, I should give the chalk test a whirl.

 

If air pressure wasn't important, nascar wouldn't worry about taking 1/2 pound out or add air on the right front to make it turn better.

 

People do laugh at me, but I do like digi gauges that read tenths. Just because I like to be within 1psi cold. 0.5psi or more just doesn't work for me side to side.

I built @Shellshock 's i deflator / inflator with a nice digi gauge. Damn nice esp with the valve clamp that he recommends.

 

people underestimate air pressure for sure. 5lbs can make a huge difference in every day driving

on the trail, 15 psi vs 25 vs 35 psi can be the difference between a good day or a very bad day

 

Very true.