When temperatures drop, the air pressure inside tires decreases, often triggering the tire pressure monitoring system (TPMS). This phenomenon is a direct result of the ideal gas law, which states that pressure is proportional to temperature. A 10-degree Fahrenheit drop can lead to a 1-2 PSI decrease in tire pressure. This can illuminate the TPMS warning light, even if the tires are not significantly underinflated.
Proper tire inflation is crucial for vehicle safety, fuel efficiency, and tire longevity. Underinflated tires increase rolling resistance, leading to reduced fuel economy and increased wear. More critically, underinflation compromises handling and braking performance, increasing the risk of accidents. The TPMS, a relatively recent automotive safety feature mandated in the United States since 2007, plays a vital role in alerting drivers to potential pressure issues, enhancing safety and preventing costly tire damage. Its function becomes particularly relevant during colder months when pressure fluctuations are more pronounced.