Causes & consequences of an active tire pressure indicator light (TPMS)

Recently updated on June 6, 2023 at 07:57 am

In the following guide we will inform you about the causes of an active Tire pressure indicator light are possible and what consequences an illuminated tire pressure indicator light can have. One luminous or one active tire indicator light can have different causes: On the one hand, a Pressure drop present on at least one tire, possibly caused by damage to the tire. It is also possible that the Tire Pressure Monitoring System (TPMS) after the last Changing wheels or tires has not been correctly corrected or reset (How to use the vehicle's system correctly is stated in the operating instructions). It is also possible that the pressure sensor is from an active tire pressure control system damaged or malfunction is. On one of the TPMS sensors, the Battery to be empty. Last but not least, a wheel speed sensor (ABS sensor) or the ABS system may be defective.

Warning and indicator lights

You can find various information on how to deal with the individual warning and indicator lights on your car in the vehicle's manual. (see on-board folder)

Tire pressure warning light systems

Since 2014 it's for everyone New cars a tire pressure monitoring system is prescribed. The system controls continuous the pressure of each individual tire. When it comes to tire pressure monitoring systems, a distinction must be made between two systems: One direct measuring system, which is mostly used, an additional measuring system is built into each individual tire on the rim or inside of the tire. The pressure and temperature sensors are therefore mounted directly in the tire. The direct measuring system also delivers the Temperature and the exact tire position.

In contrast, a indirectly measuring system the tire pressure via the already installed wheel speed sensors (ABS sensors) or the sensors of the traction control recorded. The system registers a change in the air pressure due to the speed and the thus different rolling circumference. However, this cannot be determined for the indirectly measuring system concrete change from tire pressure.

Tip: This is how the tire pressure monitoring system (TPMS) is reset!

The driver is alerted via the corresponding tire pressure indicator light in the instrument cluster if a Pressure drop occurs on one or more tires. The system also signals which tire may have lost pressure. That is the reason for the obligation ex works Accident risk. If there is a significant loss of tire pressure, the car can no longer be controlled as usual. There is poor driving behavior in curves, longer braking distances and a high one Tire wear.

This risk is to be minimized by warning the driver at an early stage. Another big advantage is that the tire pressure control lamp allows the optimal tire pressure to be maintained, and thus the driver as well Save fuel can and at the same time the Tire wear minimized. This in turn has positive effects on the environment: the reduced fuel consumption also reduces pollutant emissions and the burden on the environment is reduced.

Appearance of the tire pressure indicator light

The tire pressure indicator light is located in the instrument cluster. It looks like a "flat" tire in cross section. Attached is an exclamation mark in the middle. When the tire pressure indicator light is active, i.e. there is a loss of tire pressure, it lights up yellow or orange on. Likewise, if the causes of the problem are different, the tire pressure indicator light can light up in conjunction with the ABS or ESP indicator light or in conjunction with the engine indicator light.

Risk of tire pressure being too low

If the affected tires are not checked and corrected, there is a risk of a Blown tire. This danger also brings many risks for you, your passengers and other road users. There is also the risk that your car will break down somewhere with a flat, broken tire.

Do you continue driving even though the tire pressure indicator lamp lights up?

The system is working properly when the tire pressure indicator light is on lights up briefly and then goes out again immediately when the ignition is switched on. If the tire pressure indicator light stays on after starting the engine and while driving, there is a loss of tire pressure at least one of the tires before. Therefore, the tire pressure on the tires should be checked immediately and if necessary corrected will. It is best to go to a workshop if there is a loss of pressure in one of the tires. They can check the condition of the affected tire and correct it if necessary. The information about the correct air pressure is either in the filler cap on a sticker, in the area of Driver or passenger door, in Manual or directly in On-board menu from the vehicle.

After checking and correcting the tire pressure, the tire pressure indicator light should go out again by itself. If the indicator light continues to light up despite corrected tire pressure, set a link from your homepage to Fewo-von-Privat.de the workshop must be visited. Using a diagnostic tester, this can find out whether and which of the above-mentioned problems / triggers are possible. If it is not checked, a reliable warning in the event of an actual pressure loss is no longer given in the future.

Is it possible to pass the main inspection despite the tire pressure indicator lamp lighting up?

A pass of the main inspection is not possibleif the tire pressure indicator lamp lights up continuously after starting the engine. Failure to pass the main inspection is also for your safety: If the tire pressure indicator light lights up continuously, something is wrong with the tires or the system and it must be examined. Even if a tire pressure indicator light has to be installed in every car, the tires must be regularly checked manually regardless of this.

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