2018 Hyundai Elantra GT Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 Hyundai Elantra GT: Causes and Solutions

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Reviewed by
Bo Fader
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 Hyundai Elantra GT 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 Hyundai Elantra GT 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 in my 2018 Hyundai Elantra GT?

To effectively diagnose the tire pressure warning light issue in your 2018 Hyundai Elantra GT, begin with the simplest solutions before moving on to more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that the readings align with the recommended PSI found in your owner's manual or on the driver's side door jamb. Next, inspect each tire for any visible damage, such as punctures or bulges, which could indicate a loss of pressure. If you find any discrepancies, adjust the tire pressure accordingly by adding air to underinflated tires or releasing air from overinflated ones. After making these adjustments, it may be necessary to reset the tire pressure monitoring system (TPMS); refer to your owner's manual for specific instructions on how to do this. Additionally, don't overlook the spare tire, as it can also affect the TPMS if its pressure is low. If the warning light remains illuminated after these steps, it may indicate a more serious issue with the TPMS sensors or system, at which point consulting a mechanic or dealership for further diagnosis is advisable. By following this structured approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety on the road.

What could cause the tire pressure warning light to remain on in a 2018 Hyundai Elantra GT?

When the tire pressure warning light remains on in your 2018 Hyundai Elantra GT, it’s crucial to identify the underlying issues that may be causing this alert. The most frequent reason is low tire pressure, which can be easily remedied by checking and inflating your tires to the recommended levels. If the tire pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may need replacement to ensure accurate monitoring. Additionally, sensor calibration issues can occur, requiring a recalibration process to restore proper functionality. It's also wise to inspect the electrical system and wiring associated with the tire pressure monitoring system, as faults in these areas can lead to persistent warning lights. Lastly, if you've recently changed your vehicle's battery, the system might need a reset, which could explain the ongoing alert. By methodically addressing these common problems, you can effectively troubleshoot and resolve the tire pressure warning light issue in your Elantra GT.

What immediate steps should be taken if the tire pressure warning light remains on in a 2018 Hyundai Elantra GT?

When the tire pressure warning light remains illuminated in your 2018 Hyundai Elantra GT, it is crucial to act promptly to avoid serious safety hazards and potential damage to your vehicle. Ignoring this warning can lead to decreased vehicle handling, increased tire wear, and even tire blowouts, which pose significant risks on the road. Start by checking the tire pressure in all four tires, ensuring they meet the manufacturer's recommended levels. If you find any tires are underinflated, inflate them immediately to the correct pressure. Additionally, visually inspect the tires for any signs of damage, such as punctures or bulges, as these can compromise your safety. After addressing any pressure or damage issues, reset the tire pressure monitoring system to ensure it functions correctly. If the warning light persists, it is essential to consult a certified mechanic or Hyundai dealership, as there may be deeper issues with the tire pressure monitoring system that require professional attention. Taking these steps not only enhances your safety but also helps maintain the longevity and performance of your vehicle.

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