2018 Mercedes-Benz GLC63 AMG Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 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 2018 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 2018 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 2018 Mercedes-Benz GLC63 AMG?

When diagnosing the tire pressure warning light issue in your 2018 Mercedes-Benz GLC63 AMG, it's essential to adopt a systematic approach that prioritizes simpler solutions before delving into more complex diagnostics. Begin by manually checking the tire pressure in all four tires with a reliable tire pressure gauge, ensuring that the readings align with the manufacturer's recommended levels found in your owner's manual or on the sticker located inside the driver's door jamb. Next, inspect each tire for visible damage, such as punctures or bulges, which could lead to pressure loss and trigger the warning light. If the tire pressure is correct and no damage is evident, consider resetting the tire pressure monitoring system (TPMS) as outlined in your vehicle's manual, as this can sometimes resolve minor glitches. Should the warning light persist, it may indicate a malfunctioning tire pressure sensor, which would require professional diagnosis and potential replacement. If these steps do not yield results, visiting a certified mechanic or dealership for a comprehensive inspection is advisable to ensure your vehicle's safety and performance. By following this diagnostic approach, you can effectively troubleshoot the issue while minimizing unnecessary repairs.

What could be causing the tire pressure warning light to remain on in a 2018 Mercedes-Benz GLC63 AMG?

When the tire pressure warning light stays illuminated in your 2018 Mercedes-Benz GLC63 AMG, it’s essential to understand the common problems that could be at play. One of the primary culprits is low tire pressure, which can occur due to natural air loss, temperature fluctuations, or slow leaks. Regularly checking and maintaining the correct tire pressure is crucial for both safety and performance. Another potential issue is a faulty tire pressure sensor; if the sensor is malfunctioning, it may not provide accurate readings, causing the warning light to remain on. Additionally, sensor calibration can sometimes be off, necessitating a reset to ensure accurate monitoring. Electrical or wiring problems can also contribute to this issue, as damaged connections may disrupt communication between the sensors and the vehicle’s computer. By being aware of these common problems, you can take the necessary steps to troubleshoot and resolve the tire pressure warning light issue effectively.

How urgent is it to address the tire pressure warning light on a 2018 Mercedes-Benz GLC63 AMG?

Addressing the tire pressure warning light on a 2018 Mercedes-Benz GLC63 AMG is of utmost urgency due to the significant safety risks and potential vehicle damage associated with neglecting this warning. When the tire pressure is not within the recommended range, it can severely compromise the vehicle's handling and braking capabilities, leading to dangerous driving conditions. Additionally, improper tire pressure can accelerate tire wear and diminish fuel efficiency, resulting in higher costs over time. The Tire Pressure Monitoring System (TPMS) serves as a critical alert mechanism, and ignoring its signals can lead to further tire damage or even blowouts, which pose serious safety hazards. Mercedes-Benz emphasizes the importance of regular tire pressure checks to maintain optimal vehicle performance and safety. Therefore, it is essential to take immediate action when the tire pressure warning light illuminates, ensuring both your safety and the longevity of your vehicle.

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