2020 Mercedes-Benz C63 AMG S Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2020 Mercedes-Benz C63 AMG S: Causes and Solutions

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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 2020 Mercedes-Benz C63 AMG S 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 C63 AMG S 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 C63 AMG S?

When diagnosing the tire pressure warning light issue in your 2020 Mercedes-Benz C63 AMG S, it's essential to adopt a systematic approach that begins with the simplest solutions. Start by manually checking the tire pressure in all four tires using 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 any visible damage, such as punctures, cuts, or bulges, which could indicate a loss of pressure. If the tire pressure is correct and no damage is evident, the next step is to reset the tire pressure monitoring system (TPMS), as it may require recalibration after adjustments. Refer to your vehicle's manual for specific reset instructions. If the warning light remains illuminated, it may signal a faulty tire pressure sensor, which would necessitate professional inspection and potential replacement. Should you find yourself unable to resolve the issue through these steps, seeking assistance from a certified mechanic or dealership is advisable for a comprehensive diagnosis and repair. By following this methodical approach, you can effectively address the tire pressure warning light concern in your vehicle.

What could cause the tire pressure warning light to remain on in a 2020 Mercedes-Benz C63 AMG S?

When the tire pressure warning light remains illuminated in a 2020 Mercedes-Benz C63 AMG S, it can signal several common issues that DIY enthusiasts can address. The most frequent cause is low tire pressure, which can easily be checked and corrected by inflating the tires to the manufacturer's recommended levels. If the tire pressure is adequate, the next step is to examine the tire pressure sensors; a malfunctioning sensor may not provide accurate readings, thus keeping the warning light on. Additionally, sensor calibration might be necessary, as improperly calibrated sensors can lead to persistent alerts. It's also important to consider potential electrical faults within the tire pressure monitoring system, which could stem from wiring issues or a blown fuse. If these DIY troubleshooting steps do not resolve the warning light, it may be prudent to consult a professional for a diagnostic check to ensure the vehicle's safety and optimal performance.

What immediate actions should be taken if the tire pressure warning light remains on in a 2020 Mercedes-Benz C63 AMG S?

When the tire pressure warning light remains illuminated in your 2020 Mercedes-Benz C63 AMG S, it is crucial to act promptly to avoid potential safety hazards and costly repairs. First, checking the tire pressure in all four tires is essential; using a reliable tire pressure gauge ensures that each tire is inflated to the manufacturer's recommended levels, which can be found in the owner's manual. Neglecting this step could lead to uneven tire wear or even a blowout while driving. Additionally, inspecting the tires for visible damage such as punctures or bulges is vital, as any compromised tire may need immediate replacement to maintain safe driving conditions. If the tire pressure is correct and no damage is found, attempting to reset the tire pressure monitoring system is the next step; this can often resolve the issue without further intervention. However, if the warning light persists, it is advisable to seek professional assistance, as ignoring the problem could lead to more significant mechanical failures or safety risks. Until the issue is resolved, it is wise to avoid high speeds, as this can exacerbate any underlying tire problems. Taking these immediate actions not only ensures your safety but also helps maintain the performance and longevity of your vehicle.

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2020 Mercedes-Benz C63 AMG S Tire Pressure Warning Light Fix