Skip the auto shop - Our mechanics make house calls

Q: Why might the Low Tire Pressure light come on in the dash?

asked by on

Why might the Low Tire Pressure light come on in the dash?

Your car’s tire pressure monitoring system (TPMS) is designed to alert you when a tire’s pressure drops below a specific threshold. However, it might not mean that you have a flat. Here are a few things you need to know about the TPMS system and the Low Tire Pressure light:

  • Your tires lose air naturally over time. If it’s been some time since you checked and adjusted the air in your tires, one or more could be low due to natural causes, making the light turn on.

  • The Low Tire Pressure light will turn on if you have a flat tire and install the spare (even though the spare has a tire pressure sensor). It will turn off when you replace the regular wheel and sensor.

  • The Low Tire Pressure light may not come on if you’re using tires without sensors, if the sensors aren’t registered with the system, if the tires are inflated to 73 PSI or if there is interference from strong nearby radio signal sources. Snow and ice accumulations on the wheel will also affect the signal and may disable the TPMS system.

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 steering wheel audio controls?

While you can use the buttons and knobs on the radio itself to change the station, cycle through tracks, adjust the volume and more, doing so while you’re driving can be very distracting, which is never a good thing. You...

Q: I have dry rot on all 4 tires on my 2007 Toyota Corolla. I bought the car several months ago and dealership said they would replac

Hello, thank you for writing in. Having the two front tires is typically priority for a couple of reasons. One being the front tires support the engine and transmission, meaning they hold a majority of the weight. The vehicle is...

Q: My car's tire pressure monitoring system lights come on when the tire pressure is normal

Your car is equipped with wheel speed sensors on each of the four wheels which monitor wheel speed while relaying this information to the ABS and traction control system (ESC) which are controlled by the car's ECU. When the ECU...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...