2023 Mercedes-Benz GLS450 Tire Pressure Warning Light Stays On

Addressing Tire Pressure Warning Light in 2023 Mercedes-Benz GLS450

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2023 Mercedes-Benz GLS450 tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2023 Mercedes-Benz GLS450 tire pressure warning light stays on?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When a tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

The only symptoms of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What are the initial steps to diagnose a persistent tire pressure warning light on a 2023 Mercedes-Benz GLS450?

To effectively diagnose a persistent tire pressure warning light on your 2023 Mercedes-Benz GLS450, start by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels. Low tire pressure is a frequent culprit for triggering the warning light, so this step is crucial. Next, inspect each tire for visible damage or punctures that could lead to air loss. If the tires appear intact, consider resetting the tire pressure monitoring system as outlined in your vehicle's manual, which may resolve the issue. To confirm accuracy, use a reliable tire pressure gauge to double-check the readings. Additionally, don't overlook the spare tire, as it can also affect the warning light if its pressure is low. If, after completing these steps, the warning light remains illuminated, it may be time to consult a certified mechanic or dealership for a more comprehensive diagnosis. By following this methodical approach, you can efficiently address the warning light and ensure your vehicle's safety on the road.

What could cause the tire pressure warning light to remain on in a 2023 Mercedes-Benz GLS450?

When the tire pressure warning light remains illuminated in your 2023 Mercedes-Benz GLS450, it can be a source of concern, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is low tire pressure, which can occur due to temperature changes or natural air loss. Regularly checking and inflating your tires to the manufacturer’s recommended levels is crucial. Additionally, a faulty tire pressure sensor may be at fault; if the sensor is malfunctioning, it may not provide accurate readings, leading to a persistent warning light. Another potential issue could be the sensor's battery, which may need replacement if it is low or dead. Furthermore, the tire pressure monitoring system might require recalibration to ensure it functions correctly. Inspecting your tires for any damage or slow leaks is also essential, as these can lead to decreased pressure and trigger the warning light. Lastly, consider that an electrical fault within the system could be causing the issue, which may necessitate diagnostic testing. By addressing these common problems, you can effectively manage the tire pressure warning light and maintain safe driving conditions.

How urgent is it to address the tire pressure warning light on a 2023 Mercedes-Benz GLS450?

When the tire pressure warning light illuminates on your 2023 Mercedes-Benz GLS450, it signals an urgent need for attention. Ignoring this warning can lead to serious consequences, including decreased fuel efficiency and uneven tire wear, which not only affects your wallet but also compromises your vehicle's handling and braking performance. Proper tire pressure is essential for maintaining optimal traction and stability, particularly in challenging driving conditions. Underinflated tires significantly increase the risk of blowouts, which can result in dangerous situations on the road. By addressing the tire pressure warning light promptly, you not only enhance your safety but also protect your tires and suspension system from potential damage, ultimately saving on costly repairs. Therefore, it is crucial to take immediate action when this warning appears to ensure the longevity and performance of your vehicle.

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