What You Need To Know
- Cold air will cause your tires to lose air pressure
- Check your tires every winter and again in the spring
- Not everyone has a warning light to monitor
Imagine it is a cold morning; you rush outside to start your car. Shortly after getting it warmed up, you back out of the driveway, and you hear a noise: ding.
A funny light has appeared on your dashboard, something like this:
(Getty Images)
What is that?
It is your TMPS warning light, also known as the Tire Pressure Monitoring System. In short, it means your tires need air.
With the drop in temperatures, the air pressure of your tires will also begin to drop. In general, for every 10 degrees colder it gets, you will lose about one to two PSI (pounds per square inch) from your tires.
Why does this happen?
As the air cools, it contracts. Colder air also means fewer molecules move around. The air molecules will produce less pressure on the walls of the tires. Thus, you end up with tires that look flat.
For example, say you last had your tires aired up when it was 75 degrees outside. Now, today, it is 25 degrees. That is a 50-degree change, and it means your tires may have lost upwards of 10 PSI.
Now is the time to have your tire’s air pressure checked and, if needed, refilled. How much air do your tires need? Check on the tires themselves or the inside of the driver door.
A tire pressure label inside the driver door. (Spectrum News/Justin Gehrts)
Why is it important to keep your tires properly inflated?
Keeping your tires properly inflated can keep you safe on the road. Low tire pressure causes more of the rubber to hit the road. This leads to extra wear on your tires and can also lead to some loss of steering control.
What if the light turns off after driving for a while? You should still check your tires. Heat generates on the tire as you drive. That heat is then transferred to the air molecules inside of the tires, increasing the pressure (temporarily).
Some older model vehicles do not have TMPS sensors. If you notice your tires look a little flat, it is beyond time to have your air pressure checked.
It’s not just air pressure to keep an eye on–your tires need other care in the winter, too.
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Conclusion
As the temperatures drop, it’s essential to keep an eye on your tire pressure. Remember, for every 10-degree drop, your tires lose about one to two PSI. Don’t wait for the warning light to appear; check your tires regularly and keep them properly inflated for your safety on the road.
FAQs
Q: What is the TMPS warning light?
A: The TMPS warning light is a symbol on your dashboard that indicates your tires need air.
Q: How much air do my tires need?
A: Check on the tires themselves or the inside of the driver door for the recommended pressure.
Q: What happens if I don’t keep my tires properly inflated?
A: Low tire pressure causes more of the rubber to hit the road, leading to extra wear on your tires and loss of steering control.
Q: What if I have an older model vehicle without a tire pressure monitoring system?
A: If you notice your tires look a little flat, it’s beyond time to have your air pressure checked.
