2020 Mercedes-Benz G550 Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2020 Mercedes-Benz G550: 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 2020 Mercedes-Benz G550 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 G550 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.

How do I diagnose and resolve the tire pressure warning light issue on a 2020 Mercedes-Benz G550?

To effectively diagnose and resolve the tire pressure warning light issue on your 2020 Mercedes-Benz G550, 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 on a sticker located inside the driver's door jamb or within the owner's manual. Following this, inspect each tire for any visible signs of damage, such as punctures, cuts, or bulges, as these can contribute to pressure loss and trigger the warning light. If the tire pressure is correct and no damage is evident, proceed to reset the tire pressure monitoring system (TPMS). This reset can usually be accomplished through the vehicle's infotainment system or dashboard controls, so consult your owner's manual for specific instructions. However, if the warning light remains illuminated after these steps, it may indicate a more complex issue with the TPMS sensors or system itself, at which point seeking assistance from a qualified mechanic or dealership is advisable for further diagnosis and repair. By following this structured approach, you can efficiently address the tire pressure warning light issue 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 G550?

When the tire pressure warning light stays illuminated in a 2020 Mercedes-Benz G550, it can signal several common issues that DIYers can address. The first step is to check the tire pressure in all tires, as low pressure is the most frequent cause of the warning light. Ensuring that each tire is inflated to the manufacturer's recommended levels can often resolve the issue quickly. If the tire pressure is adequate, the next area to investigate is the tire pressure sensors; a malfunctioning sensor may need to be replaced or recalibrated. Additionally, consider the possibility of dead batteries in the sensors, which can prevent them from communicating effectively with the vehicle's system. It's also important to inspect the wiring and connections related to the tire pressure monitoring system for any signs of damage or loose connections. If all these components appear to be functioning correctly, the system may require recalibration to provide accurate readings. By addressing these potential problems promptly, DIY enthusiasts can enhance their vehicle's safety and performance, making it crucial to be aware of these troubleshooting steps.

What immediate steps should be taken to address the tire pressure warning light on a 2020 Mercedes-Benz G550?

When the tire pressure warning light illuminates on your 2020 Mercedes-Benz G550, it is crucial to act promptly to avoid serious safety risks and potential damage to your vehicle. Ignoring this warning can lead to decreased handling, increased tire wear, and even tire 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. If you find any tires underinflated, inflate them immediately using a dependable air compressor. Additionally, inspect each tire for visible damage, such as punctures or bulges, as these issues can exacerbate the problem and require urgent attention. Once you have addressed any pressure discrepancies or damage, resetting the tire pressure monitoring system is essential to clear the warning light. This process not only restores your vehicle's functionality but also reinforces the importance of regular tire maintenance for optimal performance and safety. Taking these immediate steps can help you avoid more significant issues down the line, ensuring a safer driving experience.

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