Why Your Tire Pressure Light is On: The Winter Chill and Your Tires

That dreaded tire pressure light on your dashboard… it’s almost a rite of passage as the weather turns colder. But why does the drop in temperature trigger this warning, and more importantly, what can you do about it? At AES, we’re dedicated to keeping you safe on the road, and understanding how temperature affects your tires is a crucial part of that. Let’s dive into the science behind the seasonal slump in tire pressure and how to combat it.

The Science Behind Cold Weather and Tire Pressure

Simply put, air contracts when it gets cold. Your tires are filled with air (or a nitrogen mixture, which behaves similarly), and as the temperature drops, the air inside your tires takes up less space. This results in a decrease in tire pressure.

For every 10-degree Fahrenheit drop in temperature, your tire pressure decreases by approximately 1 PSI (pound per square inch). This may not seem like much, but over time, and especially with a significant cold snap, it can add up. For example, if your tires were properly inflated at 70 degrees Fahrenheit to 35 PSI, and the temperature drops to 30 degrees Fahrenheit, you could lose as much as 4 PSI. That’s enough to trigger many vehicles’ tire pressure monitoring systems (TPMS).

The Dangers of Underinflated Tires

Driving with underinflated tires, especially in winter conditions, can be risky. Here’s why:

• Reduced Fuel Efficiency: Underinflated tires create more rolling resistance, forcing your engine to work harder and wasting gas.
• Uneven Tire Wear: Underinflation causes the edges of your tires to wear out more quickly than the center, shortening their lifespan.
• Compromised Handling: Underinflated tires can negatively impact your vehicle’s handling, making it less responsive to steering and braking. This is especially dangerous on icy or snowy roads.
• Increased Risk of Blowouts: Underinflation increases the likelihood of tire failure, especially at higher speeds.

How to Check and Adjust Your Tire Pressure in Cold Weather

Regularly checking your tire pressure, especially during the winter months, is essential for safety and optimal performance. Here’s how to do it:

1. Invest in a Reliable Tire Pressure Gauge: Don’t rely solely on the TPMS light. Purchase a quality tire pressure gauge for accurate readings.
2. Check When Tires Are Cold: For the most accurate reading, check your tire pressure before you drive or after your vehicle has been parked for at least three hours. Driving warms up the tires and artificially inflates the pressure.
3. Locate the Recommended Tire Pressure: The recommended tire pressure for your vehicle is usually found on a sticker inside the driver’s side doorjamb or in your owner’s manual. Do not inflate your tires to the maximum pressure listed on the tire sidewall. That number indicates the tire’s maximum load-carrying capacity, not the ideal pressure for your vehicle.
4. Inflate to the Correct Pressure: Use an air compressor to add air to your tires until they reach the recommended pressure.
5. Recheck After Inflation: Double-check the pressure after inflating to ensure accuracy.
6. Consider Nitrogen: While not a necessity, filling your tires with nitrogen can reduce pressure fluctuations due to temperature changes compared to regular air.

When to Seek Professional Help

If you’re unsure about checking or inflating your tires, or if you notice any signs of tire damage, don’t hesitate to visit AES. Our experienced technicians can inspect your tires, ensure they are properly inflated, and advise you on the best tire care practices for winter driving. We can also check for leaks that may be causing pressure loss beyond normal temperature fluctuations.

Conclusion: Stay Safe and Informed This Winter

Understanding the relationship between temperature and tire pressure is crucial for maintaining vehicle safety and optimal performance during the colder months. By regularly checking and adjusting your tire pressure, you can prevent underinflation, improve fuel efficiency, and ensure a safer driving experience. If you have any questions or need assistance with your tire care, contact AES today. We’re here to help you navigate the winter roads with confidence!