2021 Hyundai Ioniq Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your 2021 Hyundai Ioniq and How to Resolve Them

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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 Ioniq 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 Ioniq 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 are the initial steps to diagnose a tire pressure warning light that stays on in a 2021 Hyundai Ioniq?

To effectively diagnose a tire pressure warning light that remains illuminated in your 2021 Hyundai Ioniq, start by checking the tire pressure in all four tires, ensuring they are inflated to the manufacturer's recommended levels. This is a crucial first step, as low tire pressure is a common culprit for the warning light activation. Next, inspect each tire for any visible damage, such as punctures or bulges, which could lead to air loss. If the tire pressure is adequate and no damage is found, proceed to reset the tire pressure monitoring system following the instructions in your vehicle's manual; this can often clear false alerts. If the warning light persists, it may indicate a malfunctioning tire pressure sensor, which would require a diagnostic scan at a mechanic or dealership to pinpoint the issue. Additionally, consider environmental factors, as temperature fluctuations can impact tire pressure; always check the pressure when the tires are cold for the most accurate readings. By systematically following these steps, you can effectively troubleshoot the tire pressure warning light in your Hyundai Ioniq.

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

When the tire pressure warning light stays on in a 2021 Hyundai Ioniq, it can indicate several underlying issues that need attention. The most common reason is low tire pressure, which can result from natural air loss or punctures; therefore, regularly checking and inflating your tires to the recommended levels is essential for safety and optimal vehicle performance. Another possibility is a malfunctioning tire pressure sensor, which may fail to provide accurate readings, causing the warning light to remain illuminated. Additionally, the batteries in these sensors have a limited lifespan and may need replacement if they are depleted. It's also important to inspect the wiring and connections of the tire pressure monitoring system, as any damage or loose connections can trigger the warning light. Lastly, the system may require recalibration to ensure it operates correctly. If you have checked these common issues and the warning light persists, seeking assistance from a certified mechanic or your local Hyundai dealership is advisable for a comprehensive diagnosis and repair.

What immediate steps should be taken if the tire pressure warning light remains on in a 2021 Hyundai Ioniq?

When the tire pressure warning light remains illuminated in your 2021 Hyundai Ioniq, it is crucial to act promptly to ensure your safety and the longevity of your vehicle. Ignoring this warning can lead to decreased fuel efficiency, uneven tire wear, and even tire blowouts, which pose serious risks while driving. Start by checking the tire pressure in all four tires with a reliable gauge, ensuring they meet the manufacturer's recommended levels. If you find any tires underinflated, inflate them immediately using a dependable air compressor. Additionally, visually inspect each tire for any signs of damage, such as punctures or bulges, as these can compromise your safety on the road. Once you have addressed any pressure discrepancies or damage, reset the tire pressure monitoring system according to your owner's manual. If the warning light persists despite these efforts, it is essential to consult a qualified mechanic or Hyundai service center to diagnose any underlying issues. Taking these steps not only enhances your driving safety but also helps prevent costly repairs down the line.

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