How to Use a Car Tyre Pressure Monitor: 5 Things to Know

We've all been driving and that bizarre light comes on... the one that looks a little like a tyre. But what is it?

Well it's most likely your tyre pressure warning light, which is part of your vehicle's car tyre pressure monitoring system.

We'll go over the basics, and include the 5 most important things you should know.

Sound interesting? Keep reading to find out more!

1. Tyre Pressure Warning Light

The tyre pressure warning light is an important safety feature in modern cars that is designed to alert drivers when there is an issue with the air pressure in one or more of their vehicle's tyres.

This warning light, often depicted as a symbol resembling an exclamation point inside a horseshoe or a tyre represented by dashes, is typically located on the dashboard.

It can inform you about potential tyre-related problems that could affect the vehicle's handling, fuel efficiency, and overall safety.

The primary purpose of the tyre pressure warning light is to help drivers maintain proper tyre pressure. This is an essential component of safe and efficient vehicle operation.

Correct tyre pressure ensures optimal traction, handling, braking, and fuel efficiency. When tyre pressure falls below or exceeds the recommended levels, it can lead to compromised safety and performance.

2. There Are Two Types

Modern vehicles are equipped with tyre pressure monitoring systems (TPMS), which can be direct or indirect.

Direct TPMS systems utilize sensors mounted inside each tyre, typically on the valve stem or within the tyre itself.

These sensors continuously measure the tyre's air pressure and transmit this information wirelessly to the vehicle's TPMS control module.

If the pressure in any tyre drops below or exceeds the recommended threshold, the control module triggers the tyre pressure warning light on the dashboard, alerting the driver to the issue.

On the other hand, indirect TPMS systems do not rely on sensors inside the tyres. Instead, they use the vehicle's existing sensors, such as the anti-lock brake system (ABS) and wheel speed sensors, to monitor tyre pressure indirectly.

These systems analyze the differences in the rotational speed of each tyre. When a tyre has significantly lower pressure than the others, it tends to rotate at a slightly different speed, triggering the TPMS to illuminate the warning light.

In either system, when the TPMS warning light activates, it serves as an early warning indicator for the driver to inspect the tyre(s) with potential pressure issues.

3. What should I do if the TMPS light comes on?

If the tyre pressure warning light comes on in your vehicle, it is essential to take immediate action to address the issue and ensure your safety on the road... don't ignore it! But given you are reading this, that is a good start :-)

First off, don't panic. Make sure you stay calm and avoid any sudden or erratic manoeuvres. A tyre pressure warning is generally not an emergency, but it does require your attention.

Next, find a safe location to pull over.

As soon as it is safe to do so, signal and merge to the right or find a suitable parking area away from traffic. Don't stop abruptly or in a dangerous location.

Then you'll want to check the tyres.

Once you have pulled over, turn off the engine, engage the parking brake, and inspect all four tyres, including the spare (if your vehicle has one, as you might be needing its services shortly!). Use a tyre pressure gauge to measure the air pressure in each tyre. Compare the readings to the manufacturer's recommended tyre pressure, which can typically be found in the owner's manual or on a label inside the driver's door jamb.

4. Next Steps

If you find that one or more tyres have low pressure, inflate them to the recommended levels using an air compressor or visit a nearby gas station with an air pump.

Conversely, if a tyre is overinflated, release some air to reach the proper pressure. Make sure not to overinflate, as this can be as problematic as underinflating.

You also want to inspect for damage. While checking the pressure, also look for any visible damage to the tyres, such as punctures, cuts, bulges, or foreign objects lodged in the tread. If you notice any tyre damage, it may need immediate attention or replacement.

In some vehicles, once you have corrected the tyre pressure issue, the tyre pressure warning light may automatically reset after a short drive. However, in others, you may need to manually reset the TPMS using the vehicle's onboard computer or infotainment system.

Since this might vary depending on what kind of car you own, consult your owner's manual for specific instructions on how to reset the TPMS.

5. Professional Help

There are instances when the tyre issue indicated by the TPMS is a bit too serious to handle on your own. While there are certainly many times when the problem can be solved by inflating or deflating your tyres, that's not always the case.

If the warning light continues to illuminate or blink, or if you suspect a more severe issue, do not ignore it.

It may indicate a malfunction in the TPMS or a tyre-related problem that requires professional diagnosis and repair. In such cases, it's advisable to contact a qualified mechanic or visit a car tyre shop or service centre for a thorough inspection.

And keep in mind that you can buy tyres online, which may be a cheaper alternative to buying them in a repair shop.

Remember that maintaining proper tyre pressure is crucial for safe driving, optimal handling, braking performance, fuel efficiency, and tyre longevity.

Regularly checking and maintaining your tyre pressure is a simple but essential part of vehicle maintenance that can contribute significantly to your safety on the road.

Car Tyre Monitor

Now you know the essential elements of a car tyre monitor. This should give you peace of mind, and help you get through that annoying time when your car tyres need assistance.

Our site has a lot more info on car tyres, including a guide on what your car tyre pressure should be!