BenzManNy

It is below freezing point here and my tire sensors are going crazy. My tires are ok but the TMPS sensors sending the message to check tire pressure. What's the best pressure to avoid this?

xaran

The pressure will vary due to the temp changes. Just reset the value to the lower cold pressure

Sportstick

Tire pressure will vary approximately 1 psi for each change of 10 degrees F. The routine remains the same, however, of checking tire pressure on undriven tires, essentially "cold", such as first thing in the morning. Whatever the ambient temperature may be, always maintain the same pressure in the tires, per the label on the fuel filler door, or a close variation to your personal preference. The TPMS doesn't react to temperature....the sensors will always be looking for the proper pressure.

jadatis

It depends on wich reserve is used to determine the advice -pressure.
for normal use less pressure is needed then for fully loaded , for wich the Gross alxe weight ratings are filled in in the formula.
So When in winter always only driver and passenger in car, you could , or beter I can do that if you give the right data, calculate a save lowest pressure .
Then if you fill that cold in winter so low outside temperature , it rises in summer because of the higher outside temperature, wich is not that bad.
I can also calculate it back to warmer outside temperature for you so you can fill that in a garage, where its warmer then outside.
Cold tire pressure means that the inside tire temperature is the same as outside.
Cold filled a t 18 dgr Celcius/65dgr Fahrenheit gives with normal pressure a inside warm temperature of about 45 dgr C/112dgr F.
By severe braking , the inside tire temperature can rise to even boiling point of water so 100dgr C/ 200dgr F ? .

If then this lowest save pressure for your situation is lower then the alarm of TPMS you can reset that to the lower pressure.
Sometimes also a high pressure allarm can be given , then you have to set that as high as possible.

BenzManNy

Issue resolved. All the tires were set to 25PSI when the max load is 50PSI. I was border line driving on 4 flats. Filled all 4 to 40PSI and the issue is gone. The "Dingos" at the dealer didn't do their job checking the air pressure when I took the car to do the oil change 2 weeks ago.

Pete7874

Well, they may have checked the pressure when the tires were still warm after being driven on and inside the shop where the temps are higher. After the tires cool off and if the outside temps drop, it's quite normal for the PSI to be significantly lower than when they checked it.

There is no such thing as best tire pressure for cold temperature. The pressure should be the same as listed on your door placard. However, the key is to measure it under the conditions in which you'll be driving. This means tires need to be cold and car parked outside. Otherwise, if you just got home and parked the car in a warm garage, your reading will not be representative of the pressure when driving.

Granted, nobody wants to leave their car outside overnight to get this right. So, alternative is to park inside, wait a few hours for the tires to cool off and then just figure out the temperature difference between inside and outside, and add about 1 PSI for every 10F degree difference, as the other posted already noted.