You’re driving along when suddenly, the TPMS sensor light appears on your dashboard. Your first thought might be, “Do I have a flat tire?” But after checking, everything looks fine. So why did the warning light come on?
If the temperature outside just dropped (or rose), you may have experienced a normal fluctuation in tire pressure. Seasonal temperature changes can affect the air inside your tires, causing TPMS sensors to activate. But while this might seem like a minor issue, ignoring it can lead to safety risks, reduced fuel efficiency, and premature tire wear.
At Federal Way Automotive, we help drivers in Federal Way, Tacoma, and surrounding areas understand how TPMS sensors work and why keeping the right tire pressure is essential for your safety. In this article, we’ll explain why temperature changes affect your TPMS sensors, what to do when the light comes on, and how to maintain proper tire pressure year-round.
What Are TPMS Sensors and How Do They Work?
TPMS (Tire Pressure Monitoring System) sensors are designed to monitor the air pressure in your tires and alert you when it drops too low. There are two types of TPMS systems:
- Direct TPMS: Each tire has a sensor inside that measures actual air pressure and sends real-time data to your car’s computer.
- Indirect TPMS: This system relies on wheel speed sensors to detect changes in rotation, which can indicate a drop in tire pressure.
When the system detects that one or more tires have low air pressure, it triggers the TPMS sensor light on your dashboard.
Why TPMS Sensors Are Triggered by Weather Changes
Temperature plays a crucial role in tire pressure. As the air inside your tires expands and contracts with temperature shifts, the TPMS sensor may detect these changes and turn on the warning light.
Here’s why this happens:
- Cold Weather Lowers Tire Pressure – When temperatures drop, air molecules contract, reducing the pressure inside your tires. For every 10°F decrease in temperature, tire pressure drops by about 1-2 PSI. This is why you might see your TPMS sensor light come on after the first cold snap of the season.
- Warm Weather Increases Tire Pressure – Heat causes air to expand, increasing tire pressure. If your tires were already close to the maximum recommended PSI, this increase can sometimes trigger the TPMS sensor as well.
- Sudden Temperature Swings – If you experience significant temperature shifts between night and day, your tire pressure may fluctuate enough to trigger the warning light, even if your tires were properly inflated the day before.
Is It Safe to Drive with the TPMS Light On?
If your TPMS sensor light comes on, it means your tire pressure is outside the recommended range. While you may still be able to drive, low tire pressure can pose serious safety risks:
- Reduced Traction – Underinflated tires have less contact with the road, increasing the risk of hydroplaning or losing control on wet or icy surfaces.
- Decreased Fuel Efficiency – Tires with low pressure create more rolling resistance, forcing your engine to work harder and burn more fuel.
- Uneven Tire Wear – Driving with improper tire pressure can cause premature wear, leading to costly replacements.
- Increased Risk of Blowouts – Over time, low pressure weakens tire sidewalls, increasing the risk of a dangerous blowout while driving.
If the TPMS sensor light comes on, it’s best to check your tire pressure as soon as possible and adjust it to the manufacturer’s recommended PSI.
What to Do When Your TPMS Light Comes On
If your TPMS sensor is triggered, follow these steps:
- Check All Four Tires – Use a tire pressure gauge to measure each tire’s PSI and compare it to the recommended level in your owner’s manual or on the sticker inside the driver’s door.
- Inflate or Deflate as Needed – If your tire pressure is too low, add air until it reaches the proper PSI. If it’s too high, release air to avoid overinflation.
- Drive for a Few Miles – Once your tires are properly inflated, the TPMS sensor light should turn off after a short drive.
- Inspect for Leaks or Damage – If your tire pressure keeps dropping, you may have a slow leak, puncture, or failing valve stem.
If the TPMS sensor light stays on after adjusting your tires, a professional inspection at Federal Way Automotive can diagnose and resolve the issue.
How to Prevent TPMS Issues in Changing Weather
Keeping your tire pressure within the correct range year-round helps prevent unnecessary TPMS warnings and ensures your safety on the road. Here are a few tips:
- Check Tire Pressure Monthly – Don’t wait for the TPMS sensor light to come on. Regularly checking your tire pressure ensures you catch small changes before they become big problems.
- Adjust for Seasonal Changes – As temperatures shift, add or release air to maintain the correct PSI.
- Keep a Tire Pressure Gauge in Your Car – This simple tool helps you monitor your tire pressure anytime, anywhere.
- Inspect Your Tires for Wear and Tear – Cracks, uneven wear, and punctures can cause slow leaks, leading to frequent TPMS warnings.
- Schedule Regular Tire Maintenance – Professional inspections at Federal Way Automotive help identify potential issues before they affect your driving safety.
When to Seek Professional Help for TPMS Issues
If your TPMS sensor light stays on even after inflating your tires, it may indicate:
- A faulty TPMS sensor – Sensors inside the tires can wear out over time and may need replacement.
- A damaged valve stem – The valve that allows air into the tire can crack or deteriorate.
- A slow leak or puncture – Even a small nail or piece of debris can cause gradual pressure loss.
- An issue with your vehicle’s TPMS system – Wiring or software issues can sometimes cause false warnings.
At Federal Way Automotive, our technicians can diagnose TPMS sensor problems and ensure your tire pressure is properly maintained for maximum safety and performance.
Keep Your Tires Properly Inflated with Federal Way Automotive
Your TPMS sensors help protect you by warning of low tire pressure, but they shouldn’t be ignored. Whether it’s a seasonal pressure drop or a more serious issue, staying on top of tire maintenance improves safety, fuel efficiency, and tire lifespan.
If your TPMS sensor light is on or you need a tire inspection, Federal Way Automotive is here to help. Our expert team will ensure your tire pressure is at the right level so you can drive confidently in any weather.
📞 Call us today at (253) 922-7200 or visit us at 8116 Pacific Hwy E, Tacoma, WA 98422 for expert TPMS and tire services!
