Skip the auto shop - Our mechanics make house calls

Q: Faulty low air pressure sensor.

asked by on

My low air pressure sensor is on, even though the tire pressure is okay.

The tire pressure monitoring system will only trigger a warning light for three reasons including a low tire pressure. The other two reasons are if the computer does not detect a signal from a sensor due to it being missing or if a sensor has a low battery. Assuming that all of your sensors are still present the most likely cause is a low battery in one of the sensors. Unfortunately, these batteries are not replaceable and the whole sensor must be replaced to correct the issue. I would recommend taking your vehicle to a place that services tires as these sensors can be very difficult to replace without a tire mounting machine. I would not attempt to replace a sensor on your own. Have a mechanic inspect the problem before you have the sensor replaced to make sure that you are not replacing anything unnecessary.

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 manually release the trunk?

If a discharged battery is keeping the trunk from being able to open, you can manually open it. Just follow these steps: 1. Enter the trunk area through the main cabin. 2. Use a safe and suitable tool to remove...

Q: Service tire monitor warning, tire pressure a bit high

This is likely due to the fact that the person who changed your tires may have broken your TPMS sensor in that particular wheel. If the pressure sensor is not giving a signal at all, this would mean that the...

Q: ABS not working

Hey there, thanks for writing in about your 2010 Lexus HS250h. The anti-lock braking system (ABS) is designed to prevent wheel lockup during emergency braking. The ABS control module monitors the vehicle wheel speed sensors to determine when lockup may...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.