Skip to content

Why Is My TPMS Light Flashing?

The primary function of the Tire Pressure Monitoring System (TPMS) is to alert you when tire pressure is too low, creating dangerous driving conditions. If the TPMS light is illuminated on your dashboard, your tires could be underinflated, which can lead to possible tire failure. Both overinflation and underinflation can cause premature tire wear and, possibly, tire failure. 

Technician checking tire pressure with gauge

However, if your TPMS light is flashing rather than solidly lit, it likely means there’s an issue in the actual tire pressure monitoring system itself rather than just low tire pressure. In this article, we’ll cover what a flashing TPMS light means, the common causes behind it, and what you can do to ensure your vehicle’s tire pressure monitoring system continues operating as it should.

What does a Flashing TPMS Light Mean?

A solid TPMS warning light that’s illuminated typically means the vehicle’s tires have low air pressure and need to be inflated. However, a light that flashes for 60-90 seconds and then illuminates solid is signaling that there is a problem with the TPMS system. Likely, one or more of the sensors are not communicating with the vehicle. This can be caused by various issues. The flashing light could mean the sensor is damaged, missing, or has a dead battery and needs to be replaced./ It can also mean that an incorrect sensor is installed on the tire.

Common Causes Of a Flashing TPMS Light 

A flashing TPMS (Tire Pressure Monitoring System) light usually indicates a malfunction within the TPMS system itself, rather than just low tire pressure. A steady light typically signifies low tire pressure, but a flashing light suggests a more serious issue, potentially a faulty sensor, a dead sensor battery, or an incorrect sensor relearn procedure after tire rotation or replacement.

1. TPMS Malfunction:

A flashing light for 60-90 seconds after starting the car and then staying on indicates a problem with the TPMS system. Most likely due to a damaged sensor, a dead sensor battery, or an issue with the system’s ability to communicate with the sensors. Your TPMS system might need to be serviced by a professional. 

2. Low Tire Pressure: 

While a steady TPMS light often means low tire pressure, a flashing light can still indicate low pressure, but also point to a sensor problem. If the light is flashing, it’s still a good idea to check your tire pressure, but also consider that a sensor might be faulty. 

3. Sensor Issues:

Dead Battery:

TPMS sensors have internal batteries that can die, causing the sensor to malfunction. 

Damaged Sensor:

Sensors can be damaged by impacts, weather, or road debris. 

Incorrect Relearn Procedure:

If tires have been rotated or replaced, the TPMS needs to relearn the sensor IDs. If the relearn procedure isn’t done correctly, the light may flash. 

What To Do

Tire Pressure Monitoring System Service in Florissant

At Gary’s Auto Service in Florissant, our experienced team will ensure that not only are your tires at the correct PSI, but also that the tire pressure management system (TPMS) sensors are all operating as needed to provide you with an accurate reading of your tire pressure at all times. If you’re experiencing an active TPMS light or other issues regarding the tire pressure of your vehicle, contact the tire experts at Gary’s Auto Service. Our team has the expertise and equipment to ensure your tires are always at a healthy and efficient pressure for driving. Give us a call or schedule online with our friendly team today!