2020 Mercedes-Benz GLC63 AMG Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2020 Mercedes-Benz GLC63 AMG: Causes and Solutions

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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 GLC63 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 GLC63 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 2020 Mercedes-Benz GLC63 AMG?

To effectively diagnose the tire pressure warning light issue in your 2020 Mercedes-Benz GLC63 AMG, begin with the simplest step: 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 located 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, cuts, or bulges, as these can lead to air loss and trigger the warning light. If the tire pressure is correct and there are no visible issues, consider resetting the tire pressure monitoring system (TPMS) as outlined in your vehicle's manual, which can sometimes resolve false alerts. Should the warning light remain illuminated, it may indicate a malfunction in one of the tire pressure sensors, necessitating a professional inspection. If you find yourself unable to diagnose or fix the issue after these steps, visiting a certified mechanic or dealership is advisable for a comprehensive evaluation and repair. By following this structured approach, you can efficiently troubleshoot the tire pressure warning light and ensure your vehicle's safety and performance.

What could be causing the tire pressure warning light to remain on in a 2020 Mercedes-Benz GLC63 AMG?

When the tire pressure warning light stays illuminated in your 2020 Mercedes-Benz GLC63 AMG, it’s essential to identify the underlying issues that may be causing this alert. The most frequent reason is low tire pressure, which can be easily checked using a tire pressure gauge. If you discover that any tire is under-inflated, simply inflating it to the recommended level can often resolve the warning light. However, if the tire pressure is adequate, the issue might stem from a faulty tire pressure sensor that may need replacement. Additionally, if the vehicle has recently had tire changes or rotations, the tire pressure monitoring system might require recalibration to ensure accurate readings. It’s also prudent to inspect the tires for any leaks or punctures, as these can lead to a slow loss of pressure. Lastly, problems with the wiring or control module linked to the tire pressure sensors could be the culprit, which may necessitate a professional diagnosis and repair. By methodically addressing these common issues, you can effectively troubleshoot and resolve the tire pressure warning light in your vehicle.

What immediate steps should be taken to address the tire pressure warning light on a 2020 Mercedes-Benz GLC63 AMG?

When the tire pressure warning light illuminates on your 2020 Mercedes-Benz GLC63 AMG, it is crucial to act promptly to avoid serious safety risks and potential damage to your vehicle. Ignoring this warning can lead to decreased traction, increased tire wear, and even blowouts, which can compromise your safety on the road. Start by checking the tire pressure of all four tires with a reliable gauge, ensuring they meet the manufacturer's specifications found in the owner's manual or on the door jamb. If you discover any tires are underinflated, inflate them immediately using an air compressor or portable inflator. Additionally, inspect each tire for visible damage, such as punctures or bulges, as these issues can exacerbate the problem and require repair or replacement. Once you have addressed the tire pressure and any damage, remember to reset the Tire Pressure Monitoring System (TPMS) to ensure accurate readings moving forward. By taking these immediate steps, you not only enhance your vehicle's performance but also prioritize your safety and that of others on the road.

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