2021 Hyundai Sonata Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2021 Hyundai Sonata: 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 2021 Hyundai Sonata 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 2021 Hyundai Sonata 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 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 2021 Hyundai Sonata?

When addressing the tire pressure warning light issue on your 2021 Hyundai Sonata, it's crucial to follow a structured diagnostic approach that prioritizes simpler solutions before moving on to more complex ones. Begin by checking the tire pressure in all four tires with a reliable tire pressure gauge, ensuring they are inflated to the specifications outlined in your owner's manual. This straightforward step can often resolve the warning light if the pressure is found to be low. Next, conduct a visual inspection of the tires for any signs of damage, such as punctures, cuts, or bulges, which could indicate a more significant issue. If the tires appear intact, proceed to reset the tire pressure monitoring system according to the instructions in your manual, as this can help eliminate false alerts. Additionally, inspect the valve stems for any leaks or damage, as these components can also affect tire pressure. Should the warning light persist after these checks, it may be necessary to seek assistance from a mechanic or visit a Hyundai service center for a thorough evaluation. By systematically following these steps, you can effectively diagnose and address the tire pressure warning light issue, ensuring your vehicle remains safe and reliable on the road.

What could cause the tire pressure warning light to stay on in a 2021 Hyundai Sonata?

When the tire pressure warning light stays on in a 2021 Hyundai Sonata, it is essential to identify the underlying issues to ensure safe driving. The most common reason for this warning light is low tire pressure, which can result from natural air loss or punctures. Regularly checking and maintaining the recommended tire pressure in all tires is vital for vehicle safety and performance. Another potential cause could be a faulty tire pressure sensor; if the sensor is malfunctioning, it may need to be replaced to restore accurate readings. Additionally, the sensors may require recalibration to ensure they are functioning correctly, which can often be done by following the manufacturer's guidelines. Electrical or wiring issues within the tire pressure monitoring system can also lead to the warning light remaining illuminated, and these problems typically necessitate a professional inspection for resolution. Lastly, a malfunctioning control module that oversees tire pressure monitoring may be responsible for the persistent warning light, potentially requiring repair or replacement. By addressing these common issues promptly, you can enhance your vehicle's safety and performance on the road.

How urgent is it to address the tire pressure warning light on my 2021 Hyundai Sonata?

Addressing the tire pressure warning light on your 2021 Hyundai Sonata is an urgent matter that should not be overlooked. Ignoring this warning can lead to serious safety risks, including reduced traction and an increased likelihood of tire blowouts, which can jeopardize your driving experience and overall safety on the road. Additionally, driving with underinflated tires can result in uneven wear, diminishing the lifespan of your tires and leading to costly replacements. Furthermore, improper tire pressure can negatively impact your vehicle's fuel efficiency, causing you to spend more at the pump over time. By promptly checking and adjusting your tire pressure, you not only enhance your vehicle's handling and braking performance but also ensure a safer driving environment for yourself and others. Therefore, it is crucial to take immediate action when the tire pressure warning light illuminates, safeguarding both your vehicle and your wallet in the long run.

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