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Guide to Tire Pressure Monitoring Systems

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Notice to our customers: Important changes affecting vehicles equipped with Tire Pressure Monitoring Systems have been put into place.


What is a Tire Pressure Monitoring System?

TPMS stands for Tire Pressure Monitoring System. It is a feature on many late model vehicles that monitors tire pressure and warns the driver, with a light on the dash, if one or more of the tires’ pressure falls 25% below the original equipment manufacturer’s recommended tire pressure.

See the questions below to learn more about TPMS, and how to check if your vehicle is equipped with TPMS.


Why does TPMS exist?

As a result of tire-related safety concerns, Congress passed the TREAD Act in 2000. The TREAD Act requires vehicle manufacturers to install TPMS in new vehicles with a gross vehicle weight of 10,000 pounds or less.

What vehicles have it?

Passenger cars, SUVs, and light trucks. TPMS has been progressively introduced in new vehicles since 2005. Refer to your owner’s manual for more information.

How do I check to see if my vehicle has it?

When you start your vehicle, look at the dash for the TPMS warning lamp. If you see the warning lamp light up momentarily, your vehicle is equipped with TPMS.

What does it mean when the warning lamp is on?

The warning lamp should light up briefly when the vehicle is started. But if the light stays on, that means tire pressure is low in one or more of the tires, or the system is not able to read the sensors. In this case, you should have your tire air pressure checked. We provide this service for free at all of our Les Schwab locations.

What kind of maintenance is required on my TPMS?

Replacement or relocation of a TPMS sensor, or sometimes even just inflating a tire may cause the TPMS to get out of whack. Generally, recalibration is easy to perform: we provide this service to customers free at all Les Schwab Tire Centers.

Does this mean I don’t need to check my tire pressure?

Regardless of TPMS, we recommend tire pressure checks every 30 days. Properly maintained tire pressure decreases tire wear and improves vehicle safety, handling, braking and fuel mileage. Come in anytime for a free air check.

Use our Store Locator to find the Les Schwab nearest you.

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