Lexus NX350 Tire Pressure Warning Light Stays On

Troubleshooting the Persistent Tire Pressure Warning Light in Your Lexus NX350: 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 Lexus NX350 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 Lexus NX350 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.

Troubleshooting Tire Pressure Warning Light in a Lexus NX350

When faced with a tire pressure warning light in your Lexus NX350, the first step is to check the tire pressure in all four tires. Low tire pressure is the most common reason for the warning light to illuminate, so ensuring that each tire is inflated to the recommended PSI can often resolve the issue. If the tire pressure is adequate, consider the possibility of a depleted battery in one of the tire pressure sensors, which can also trigger the warning light. In this case, replacing the battery may be necessary. If the light persists, it could indicate a malfunctioning TPMS receiver module or a damaged pressure sensor, both of which require more in-depth diagnostics. If you're unsure about how to reset the tire pressure light after addressing these issues, you can easily do so by turning the ignition on and following the reset procedure. However, if the problem continues, seeking assistance from a professional, such as a Lexus dealership, can provide you with the expertise needed to resolve more complex issues effectively. Remember, maintaining proper tire pressure is crucial for safe driving and optimal vehicle performance, so addressing these warnings promptly is essential.

What to Do When the Tire Pressure Warning Light Stays On in a Lexus NX350?

When the tire pressure warning light remains on in your Lexus NX350, it can indicate several underlying issues beyond just low tire pressure. One common problem is a malfunctioning Tire Pressure Monitoring System (TPMS) sensor, which may require recalibration or replacement if it fails to accurately read tire pressure. Additionally, if you’ve recently changed tires or had them rotated, the sensors may need to be reset to recognize the new positions. Another possibility is a slow leak in one or more tires, which can be difficult to detect without a thorough inspection; using soapy water can help identify any air leaks. Furthermore, extreme temperature changes can affect tire pressure, so it’s essential to check the pressure regularly, especially during seasonal transitions. By understanding these common issues and their solutions, you can effectively troubleshoot the tire pressure warning light and maintain the safety and performance of your Lexus NX350.

Why is the Tire Pressure Warning Light Staying On in a Lexus NX350?

When the tire pressure warning light remains illuminated in your Lexus NX350, it is crucial to address the issue promptly to avoid serious safety risks and potential damage to your vehicle. Ignoring this warning can lead to under-inflated tires, which not only compromise your vehicle's handling and braking performance but also increase the likelihood of tire blowouts. Additionally, prolonged neglect can result in uneven tire wear, leading to costly replacements and diminished fuel efficiency. The tire pressure monitoring system (TPMS) is designed to alert you to low air pressure, but if the light stays on, it may indicate a malfunction within the system itself or other underlying issues such as a leaking tire or a faulty sensor. Regularly checking your tire pressure and ensuring that your TPMS is functioning correctly can prevent these problems, ensuring your safety on the road and extending the life of your tires. Therefore, it is essential to take immediate action if the tire pressure warning light does not turn off after addressing the basic concerns of tire inflation and leaks.

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Lexus NX350 Tire Pressure Warning Light Guide | RepairPal