TPMS is a specially designed system that will alert you if your tires are low on air. Usually, the TPMS will let you know after your tire losses at least 25% of its total air capacity. Anyhow, you can actually see why this is so important.

Namely, tire pressure is very important when it comes to driving. If you have low tire pressure, you will not be able to control your car properly and that might cause accidents on the road.

On the other hand, having a TPMS to warm you when your tire is losing pressure can actually save you from unwanted troubles.

Now, let’s see exactly how Tire Pressure Monitoring System works and everything that you need to know about it.

[tcb-script async=”” src=”//”][/tcb-script][tcb-script] (adsbygoogle = window.adsbygoogle || []).push({});[/tcb-script]

What Does TPMS Light Mean?

What Does TPMS Light Mean


So, if you see any notification on your dashboard that indicates tire pressure is low, it could mean a couple of things.

1) Obstruction

First, the light could indicate that there is a possible problem with the tire. Simply speaking, there might be an obstruction in the tire like a nail or something like a screw. Anyway, you need to check the tire immediately and see for yourself if there is something wrong with it.

2) Neglect

Sometimes the light can indicate the neglect of the tire pressure. Namely, if you didn’t set the tire pressure to manufacturer’s specifications, you will be alerted with the light on your dashboard. Also, you should check the tire pressure every 2 months just to be sure.

3) Drop in Temperature

It happens that tire pressure could drop due to the change in the outdoor temperature. This is not a common thing, especially if you live somewhere where temperature is not dropping drastically.

How Does TPMS Work?

How Does TPMS Work

Simply speaking, the only job that TPMS needs to do is to alert you when your tire is losing air. Now, there are two different types of TMPS. Both of these types have their benefits and downfalls, let’s see them.

Direct TPMS

Direct TPMS


When it comes to direct TPMS, this system is based on the fact that every tire has its own dedicated sensor. This sensor is installed directly within each tire and it is connected to the indicator steam (valve steam).

Now, when your tire losses air, this system will directly send the data to your car’s dashboard and alert you that you have a problem. This is possible because these sensors read the tire pressure correctly and will alert you if there is some air loss.



Indirect TPMS

Indirect TPMS


Now, Indirect TPMS is based on the car’s ABS (anti-lock brake system) to measure the correct level of air pressure that is based on the rotation speed.

Simply speaking, if there is one tire that spins faster or slower than other ones, this system will indicate under-inflation. The indirect TPMS has its weaknesses and strengths, so let’s see them.



Tire Pressure Light Keeps Coming on

Now, let’s discuss the situation when the tire pressure light keeps coming on. First, there are three different occasions when the light will keep coming on. Let’s see them.

TPMS Light keeps coming – When driving

TMPS Light keeps coming – Then it goes off

TPMS Light keeps coming – But flashes

[tcb-script async=”” src=”//”][/tcb-script][tcb-script] (adsbygoogle = window.adsbygoogle || []).push({});[/tcb-script]

How does TPMS know which tire is under-inflated?

how does tpms work


Now, before we answer this question, it is important to go back to the direct and indirect TPMS. Basically, if you have direct TPMS, there will be sensors that will indicate if something is wrong with your tire. This means that direct TPMS is absolutely trust-worthy and it can’t alert you of the wrong tire.

On the other hand, there is an indirect TPMS system that measures rotations on your tires and indicates you if some tire is under- performing. Simply speaking, this system measures tire rotations and if one tire is low on rotations, the light will alert you on your dashboard.

>>> Check P0420 OBD-II Code <<<

Final Verdict

As we can see, TPMS is quite important for any vehicle. With it, you will be alerted if there is something wrong with your car tires so you can check the pressure. Now, make sure to act when the light flashes on your dashboard since this is a serious thing.

Anyhow, we hope that this article made it clearer for you to understand how TPMS work and what does it do. All in all, check your tires properly.