Why Tires Go Flat in Cold Weather
Reasons warning lights shine when the temperatures fall
As winter approaches, many motorists will experience a low-pressure warning light on the dash or simply observe that the tires look a bit less full than they should. The main reason for this is the dropping temperatures, which cause the air to become denser and consequently lower the tire pressure. Couple that with tires naturally losing pressure over time, and fall and winter can be a busy time for pressure checks and adding a little air.
Tire pressure monitoring systems (TPMS) are a real boon to safety and convenience, and they have been required on all new cars since September 2007. The TPMS uses a dashboard light to let you know when one or more tires is significantly low on air. As a general rule, check the pressure monthly. Don’t wait for the tire pressure warning light to come on. It’s meant to alert you of a tire losing air while you’re driving, not serve as a maintenance reminder.