2018 INFINITI QX80 Tire Pressure Warning Light Stays On

Tire Pressure Warning Light in 2018 INFINITI QX80: 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 2018 INFINITI QX80 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 INFINITI QX80 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 INFINITI QX80?

To effectively diagnose the tire pressure warning light issue in your 2018 INFINITI QX80, begin with a straightforward approach that prioritizes simpler solutions before delving into more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring they are inflated to the levels specified in your owner's manual. This initial step can often resolve the warning light if the pressure is low. Next, inspect each tire for visible damage, such as punctures or bulges, and look for any foreign objects that may be causing a leak. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system (TPMS) as outlined in your owner's manual, as this can sometimes clear false warnings. Don’t overlook the spare tire; check its pressure as well, since it may be integrated into the TPMS. If the warning light remains illuminated after these checks, it may be time to consult a mechanic or an authorized INFINITI service center for a comprehensive diagnosis. By following this methodical approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety on the road.

What could be causing the tire pressure warning light to remain on in a 2018 INFINITI QX80?

When the tire pressure warning light stays on in a 2018 INFINITI QX80, it can signal several underlying issues that DIY enthusiasts can address. The most common reason is low tire pressure, so the first step is to check and inflate each tire to the recommended levels. If the pressure is adequate, consider the possibility of a faulty tire pressure sensor, which may need replacement if it’s malfunctioning. Additionally, sensor calibration issues can occur, requiring a recalibration that is often performed at a service center. Electrical faults within the tire pressure monitoring system can also cause the warning light to remain illuminated, and these may necessitate the use of diagnostic tools for identification and repair. Lastly, ensure that the sensors are clean and free from any obstructions, as dirt or debris can interfere with their operation. If these troubleshooting steps do not resolve the issue, it may be wise to consult a qualified mechanic for a comprehensive inspection and repair.

What should I do if the tire pressure warning light on my 2018 INFINITI QX80 stays on?

When the tire pressure warning light on your 2018 INFINITI QX80 remains illuminated, it is crucial to act swiftly to avoid safety hazards and potential damage to your vehicle. Ignoring this warning can lead to decreased traction, increased tire wear, and even blowouts, which pose serious risks while driving. Start by checking the tire pressure in all tires, including the spare, and ensure they are inflated to the recommended levels found in your owner's manual. If you find any tires underinflated, inflate them immediately to maintain optimal performance. After adjusting the pressure, resetting the tire pressure monitoring system is essential to clear the warning light; consult your owner's manual for specific instructions on how to do this. Additionally, inspect your tires for any visible damage, such as punctures or bulges, as these can exacerbate the issue. If the warning light persists despite these efforts, it is advisable to seek professional assistance, as there may be a deeper issue with the monitoring system that requires expert attention. By addressing the tire pressure warning light promptly, you ensure not only your safety but also the longevity of your vehicle's tires.

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