Q: How does the tire pressure monitoring system work?

asked by on December 15, 2015

How does the tire pressure monitoring system work?

Your car’s tire pressure monitoring system (TPMS) is designed to help you keep an eye on the tire pressure. If the system notices a drop in pressure in a tire below a specific threshold, it will turn on the Low Tire Pressure Light on the dash. This is your signal to check all four tires and add air. You should also inspect the tire for punctures or other signs of a leak.

The TPMS system works with a series of sensors inside the wheels. You have one tire pressure sensor per wheel. If the sensor is damaged, the system will turn on the TPMS light, rather than the Low Tire Pressure Light. If you have the message center in your car, it will also display a message about a sensor problem. If there is a problem with the TPMS system itself, the TPMS light will come on and message about a system fault will be displayed on the center screen.

Tip

If you’re driving with your spare tire installed, you will see the Low Tire Pressure Light and the TPMS Light. Eventually, the Low Tire Pressure Light will turn off and leave only the TPMS Light.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

What is the System Check function on the message center?

The System Check feature in your car’s message center is designed to provide you with information about various systems and their functionality. If you see a message that reads “Reset for system check” on your display, press the Reset button....

Misfire

You either have low fuel pressure or clogged fuel injectors. Have pressure checked first and if it is good then have fuel injectors cleaned and may need to be replaced.

2012 Jeep Grand Cherokee replaces altanator, still won’t start. Brake seems locked

The brakes may feel stiff prior to starting the vehicle as the vacuum that exists in the brake booster when the vehicle is running may decrease when the vehicle is not running. Once the vehicle starts, the booster replenishes the...

Related articles

A Buyer’s Guide to the 2012 Mercedes-Benz M-Class
The The 2012 Mercedes-Benz M-Class is a mid-size luxury SUV that combines utility and comfort to make the perfect every day vehicle. It can handle almost any terrain with its all-wheel drive model. Drivers and passengers will experience a quiet...
Top 10 PZEV Cars for Eco-Friendly Drivers
Teddy Leung / Shutterstock.com The whole idea of a PZEV (that is, a partial zero-emissions vehicle), seems paradoxical. You’d think it’d have to either be zero-emissions or not in the category at all. But as contradictory as...
Are Wider Tires Better?
The The size and width of the tires on your vehicle determines how your vehicle will handle in different conditions. There are several factors that go into the decision of which tires to equip your vehicle with, including: The...