2020 Mercedes-Benz GLC43 AMG Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2020 Mercedes-Benz GLC43 AMG

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Reviewed by
Aisha
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 2020 Mercedes-Benz GLC43 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 2020 Mercedes-Benz GLC43 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 on my 2020 Mercedes-Benz GLC43 AMG?

To effectively diagnose the tire pressure warning light issue on your 2020 Mercedes-Benz GLC43 AMG, begin with a thorough check of the tire pressure across all four tires. Utilize a reliable tire pressure gauge to ensure that each tire is inflated to the manufacturer's recommended levels, which can typically be found in your owner's manual or on a sticker located inside the driver's door jamb. Next, inspect the tires for any visible signs of damage, such as punctures, cuts, or bulges, as these can lead to pressure loss and trigger the warning light. If the tire pressure is correct and no damage is found, consider resetting the tire pressure monitoring system (TPMS) as it may require recalibration. Refer to your vehicle's manual for specific instructions on how to perform this reset. Should the warning light remain illuminated after these steps, it may indicate a malfunction with the tire pressure monitoring sensors, necessitating a professional inspection. If you are unable to resolve the issue independently, visiting a certified Mercedes-Benz service center is advisable, as they possess the specialized tools and expertise to accurately diagnose and address any underlying TPMS problems. By following this diagnostic approach, you can systematically identify and potentially resolve the tire pressure warning light issue.

What could cause the tire pressure warning light to stay on in a 2020 Mercedes-Benz GLC43 AMG?

When the tire pressure warning light remains illuminated in a 2020 Mercedes-Benz GLC43 AMG, it often indicates underlying issues that require attention. The most frequent culprit is low tire pressure, which can result from natural air loss, punctures, or leaks. It's essential to regularly check and maintain the recommended tire pressure to ensure optimal vehicle performance and safety. Additionally, a faulty tire pressure sensor may be at fault; if the sensor is malfunctioning, it may fail to provide accurate readings, leading to the warning light staying on. Calibration issues can also arise, necessitating a reset to ensure the sensors are correctly interpreting tire pressure levels. Furthermore, electrical or wiring problems within the tire pressure monitoring system can disrupt communication between the sensors and the dashboard, causing the warning light to persist. To address these issues, start by checking and inflating your tires to the proper pressure, inspect for any visible damage, and consider resetting the system. If the warning light continues to stay on after these steps, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable to diagnose and resolve the problem effectively.

What should I do if the tire pressure warning light stays on in my 2020 Mercedes-Benz GLC43 AMG?

When the tire pressure warning light remains illuminated in your 2020 Mercedes-Benz GLC43 AMG, it is crucial to act swiftly to avoid safety hazards and potential damage to your vehicle. Ignoring this warning can lead to decreased handling, increased tire wear, and even blowouts, which pose serious risks while driving. Start by checking the tire pressure in all tires, including the spare, using a reliable gauge to ensure they meet the manufacturer's specifications. If you find any tires underinflated, inflate them to the correct levels immediately. Additionally, inspect each tire for visible damage such as punctures or bulges, as these can compromise safety and performance. After making necessary adjustments, resetting the tire pressure monitoring system is essential to clear the warning light. If the light persists despite your efforts, it may indicate a deeper issue within the monitoring system, necessitating professional assistance. By addressing the tire pressure warning light promptly, you not only enhance your vehicle's safety but also prolong the lifespan of your tires, ensuring a smoother and more secure driving experience.

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2020 Mercedes-Benz GLC43 AMG Tire Pressure Warning Solutions