Just wanted to know if anyone else has experienced this? I have a 2010 G37x sedan and have noticed that when it snows, the tire pressure light goes on. When the temperature is in the plus it turns off again.

 

As the temperature decreases, so does the air pressure in the tires. Put a few more pounds of air in your tires when its cold.

 

I checked the pressure the first time and noticed it was fine when the light went on. Maybe its just a censor issue?

 

Happens with a lot of cars. I believe it mostly has to do with the fact that when it's super cold, the pressure will go down. However, if your pressure was correct (33psi) at about 80 degress ambient temp, then it will go down to about 29-30 at below freezing temps. That's not a huge change and I'd expect not something that would necessarily trigger the TPMS.

I know the Mercedes S and C class do this with extreme temperature change so it might be related to the type of sensor used.

 

Appreciate the feedback

 

As a general rule, tire pressure fluctuates 1 psi for every 10 degrees of temperature change. I check my tire pressure at least every week or two. For as much as people complain about every little nuance about this car, they sure don't seem to mind the significant handling changes that under/overinflated tires can cause.

 

And make sure you get a good tire gauge to measure the pressure. Don't rely on the ones at gas stations and definitely not the pencil type that have that slider on them to tell pressure. A good quality analog or even digital one will ensure proper pressure (can just keep it in the glove box).

Wurst

 

true - I found it hard to buy a good tire gauge. most are crap