Skip the auto shop - Our mechanics make house calls

Q: How does the tire pressure monitoring system work?

asked by on

How does the tire pressure monitoring system work?

A: Your car is equipped with a tire pressure m...

Your car is equipped with a tire pressure monitoring system (TPMS) that checks the pressure in each tire via a special sensor mounted inside the tire (it’s connected to the valve stem). When the system detects a drop in tire pressure beyond a specific threshold, it turns on the Low Tire Pressure light on the dash of your car. That’s your cue to find somewhere safe to pull over and check the pressure in each tire. Add air to the low tire and the Low Tire Pressure light in the dash should go off after a few miles of driving (the system has to recheck and verify the pressure before turning out).

Tips

  • You’ll also see a message reading “Check tire pressure” on your vehicle’s information display.

  • The TPMS is not a replacement for manually checking your tire pressure. Check your tires once per week with an accurate pressure gauge.

  • If the TPMS light on the dash comes on, it indicates a problem with the monitoring system, not low tire pressure.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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

Q: How do I use the luggage net?

The luggage net can be used to hold items down in the trunk, so that they don’t move around. To use the luggage net, simply attach it to luggage net holders, which are located around the inside of the trunk....

Q: How do I adjust the volume in the audio system?

The audio system’s volume is controlled by the selector knob. Turn the knob clockwise to increase the volume, and turn the knob counterclockwise to decrease the volume.

Q: How do you check the condition of the wiper blades?

Your wiper blades might not seem like the most critical component of your car, but there’s no doubt they’re vital when it starts raining. Checking their condition is very important. Here’s how to do it: Spray the windshield with...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...