2022 Mercedes-Benz GLA45 AMG Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2022 Mercedes-Benz GLA45 AMG: Causes and Solutions

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Reviewed by
Devin Cabugcal
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 2022 Mercedes-Benz GLA45 AMG 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 2022 Mercedes-Benz GLA45 AMG 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 steps should I take to diagnose the tire pressure warning light issue in my 2022 Mercedes-Benz GLA45 AMG?

To effectively diagnose the tire pressure warning light issue in your 2022 Mercedes-Benz GLA45 AMG, begin with the simplest solution: checking the tire pressure. Use a reliable tire pressure gauge to measure the pressure in all four tires, ensuring they align with the manufacturer's recommended levels found in your owner's manual or on the sticker inside the driver's door jamb. If the pressure is low, inflate the tires accordingly. Next, inspect each tire for visible damage, such as punctures or bulges, which could indicate a leak. If the tires appear to be in good condition, proceed to reset the tire pressure monitoring system (TPMS) as outlined in your vehicle's manual, as this can sometimes resolve false warnings. Should the warning light persist, it may signal a malfunctioning tire pressure sensor, necessitating a visit to a qualified technician for further inspection. By following this diagnostic approach, you can systematically address the issue, starting with the most straightforward solutions before moving on to more complex diagnostics.

What could cause the tire pressure warning light to stay on in a 2022 Mercedes-Benz GLA45 AMG?

When the tire pressure warning light stays on in a 2022 Mercedes-Benz GLA45 AMG, it signals potential issues that should not be ignored. The most common culprit is low tire pressure, which can occur due to slow leaks, changes in temperature, or the natural loss of air over time. Additionally, a malfunctioning tire pressure sensor may fail to provide accurate readings, causing the warning light to illuminate unnecessarily. Calibration issues with the sensors can also lead to incorrect readings, necessitating a reset to ensure proper functionality. Moreover, electrical or wiring problems within the tire pressure monitoring system can disrupt the communication between the sensors and the vehicle's computer, resulting in the warning light remaining on. To ensure safety and optimal performance, it is essential to regularly check tire pressure, inspect the sensors, and consult a qualified technician for any necessary repairs or recalibrations.

How urgent is it to address the tire pressure warning light on my 2022 Mercedes-Benz GLA45 AMG?

Addressing the tire pressure warning light on your 2022 Mercedes-Benz GLA45 AMG is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety concerns, as improper tire pressure significantly affects your vehicle's handling and braking capabilities, increasing the risk of accidents. Additionally, driving with incorrect tire pressure can result in uneven tire wear, which not only shortens the lifespan of your tires but also diminishes fuel efficiency, leading to higher costs over time. The risk of tire damage, such as blowouts or flats, escalates with underinflated tires, posing a danger to both you and other road users. Furthermore, maintaining the correct tire pressure is essential for optimal vehicle performance, ensuring better traction and a more comfortable ride. Therefore, it is crucial to check and adjust your tire pressure as soon as the warning light illuminates, safeguarding your safety and enhancing your driving experience.

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