Lexus LS460 Tire Pressure Warning Light Stays On

Troubleshooting the Persistent Tire Pressure Warning Light in Your Lexus LS460: Causes and Solutions

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Reviewed by
Devin Cabugcal
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 LS460 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 LS460 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 of a TPMS control module failure are failing to alert the driver of underinflation or overinflation of one or more tires, failure to communicate with the body control module or TPMS sensors, or erroneously reporting incorrect tire pressure.

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 LS460

When faced with a tire pressure warning light in your Lexus LS460, it's essential to adopt a systematic diagnostic approach. Start by manually checking the tire pressure of all four tires using a high-quality tire gauge, ensuring they are inflated to the manufacturer's recommended levels. If the pressure is low, inflate the tires accordingly and monitor if the warning light turns off. If the light persists, inspect each tire for visible signs of leaks or damage, as a puncture or a faulty valve stem could be the culprit. Additionally, consider the condition of the tire pressure monitoring system (TPMS) sensors; a dead battery in one of these sensors can trigger the warning light. If all tires are in good condition and properly inflated, yet the light remains illuminated, it may indicate a malfunction within the TPMS itself or an issue with the vehicle's electronic control unit (ECU). Addressing these potential problems in a logical order—from checking tire pressure to examining the sensors—will help you effectively diagnose and resolve the issue, ensuring your vehicle remains safe and roadworthy.

Troubleshooting Tire Pressure Warning Light in a Lexus LS460

When dealing with a tire pressure warning light in a Lexus LS460, it's essential to understand the common problems that may trigger this alert. One of the primary culprits is low tire pressure, which can occur due to natural air loss, punctures, or leaks. A quick check using a high-accuracy air gauge can help you determine if your tires are inflated to the recommended levels. If the pressure is adequate, the issue may lie within the tire pressure monitoring system (TPMS) itself, which could be malfunctioning due to a faulty sensor or a dead battery in one of the sensors. In some cases, a continuous warning light indicates a more serious problem with the TPMS, while a blinking light often points to low tire pressure. If you find that the warning light persists even after addressing these issues, consider resetting the TPMS according to your vehicle's manual. However, be cautious about disabling the warning light, as this merely masks the problem without resolving the underlying cause. By systematically checking these common issues, you can effectively troubleshoot the tire pressure warning light and ensure your Lexus LS460 remains safe and roadworthy.

Why is the Tire Pressure Warning Light Staying On in a Lexus LS460?

When the Tire Pressure Warning Light remains illuminated in your Lexus LS460, it is crucial to address the issue promptly to ensure your safety on the road. Ignoring this warning can lead to serious consequences, such as tire blowouts or loss of vehicle control, particularly if one or more tires are significantly under-inflated. A tire that is 25 percent or more below the recommended pressure not only compromises your vehicle's handling but also increases the risk of accidents. Additionally, a leaking tire or a malfunctioning tire pressure monitoring system can exacerbate the problem, leading to further damage and costly repairs if left unchecked. It is advisable to inspect your tires for visible leaks, check the pressure when the tires are cold, and ensure they are inflated to the manufacturer's specifications. If the warning light persists after these checks, consider examining the tire pressure monitoring system for potential sensor issues, including dead batteries. By taking these steps, you can mitigate risks and maintain the safety and performance of your Lexus LS460.

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