TPMS Sensors: What They Do, Why Tire Pressure Changes in Summer, and How to Spot Sensor Failure

Tire Pressure Monitoring System (TPMS) sensors are crucial components in modern vehicles, designed to ensure your safety on the road by continuously monitoring the air pressure in your tires. Here’s a comprehensive look at how these sensors work, why tire pressure fluctuates with summer heat, and how to identify potential sensor issues.

What Do TPMS Sensors Do?

TPMS sensors are installed within each tire and are responsible for monitoring the air pressure. They send real-time data to your vehicle’s onboard computer, alerting you if any tire is significantly under-inflated or over-inflated. This proactive approach helps prevent unsafe driving conditions, improves fuel efficiency, and extends the life of your tires.

Why Does Tire Pressure Change in Summer?

As temperatures rise, the air inside your tires expands, leading to increased tire pressure. This is due to the basic principle that air expands when heated. For every 10°F increase in temperature, tire pressure can increase by approximately 1 psi (pound per square inch). It's important to regularly check your tire pressure, especially during seasonal temperature changes, to maintain optimal performance and safety.

Symptoms of TPMS Sensor Failure

  • Warning Light: The most common sign of a malfunctioning TPMS sensor is the illumination of the warning light on your dashboard. This could indicate a sensor issue or simply low tire pressure.

  • Inaccurate Readings: If you notice discrepancies between the pressure readings displayed on your dashboard and the actual pressure measured with a gauge, it could signal a problem with the sensors.

  • Fluctuating Readings: Frequent fluctuations in the displayed tire pressure can be a sign that the sensors are failing or need calibration.

  • Unusual Behavior: If the TPMS light comes on intermittently or remains on even after correcting the tire pressure, the sensor may be malfunctioning.

Trust Hillside Auto Repair

At Hillside Auto Repair, we understand the critical role TPMS sensors play in your vehicle's safety and performance. That's why we stand behind our repairs with a 3-year/36,000-mile warranty on parts and labor. Our skilled technicians are committed to providing top-notch service and ensuring that your TPMS sensors—and all other components—function reliably.

Disclaimer: The information provided in this blog post is for informational purposes only. Always consult your vehicle’s owner manual and seek professional assistance for any automotive issues.