2019 Lexus LC500 Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2019 Lexus LC500

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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 2019 Lexus LC500 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 2019 Lexus LC500 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 2019 Lexus LC500?

To effectively diagnose the tire pressure warning light issue in your 2019 Lexus LC500, begin with a thorough check of the tire pressure in all four tires using a reliable tire pressure gauge. Ensure that each tire is inflated to the recommended levels outlined in your vehicle's manual, as improper inflation is a common cause of warning lights. Next, inspect the tires for any visible damage, such as punctures, cuts, or bulges, which could indicate a loss of pressure. If the tires appear to be in good condition, consider resetting the tire pressure monitoring system, as temporary glitches can sometimes trigger the warning light. Additionally, examine the valve stems for any signs of leaks or damage, as faulty stems can lead to air escaping and cause the warning light to activate. If, after these steps, the warning light remains illuminated, it may be time to consult a mechanic or dealership for a professional diagnosis, ensuring that any underlying issues are addressed promptly. By following this diagnostic approach, you can systematically identify and resolve the tire pressure warning light issue in your vehicle.

What could be causing the tire pressure warning light to stay on in a 2019 Lexus LC500?

When the tire pressure warning light stays on in a 2019 Lexus LC500, it can indicate several common issues that DIY enthusiasts can troubleshoot. The most frequent cause is low tire pressure, so the first step is to check and inflate all tires 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 to ensure accurate readings. Electrical faults within the tire pressure monitoring system can also trigger the warning light, and diagnosing these may necessitate specialized tools. Environmental factors, such as extreme temperatures or rough driving conditions, can temporarily affect tire pressure readings, so it’s wise to reassess tire pressure after such events. If these troubleshooting steps do not resolve the warning light, it’s advisable to consult a qualified mechanic for a thorough inspection and diagnosis.

How urgent is it to address the tire pressure warning light on a 2019 Lexus LC500 that stays on?

Addressing the tire pressure warning light on a 2019 Lexus LC500 is not just a matter of convenience; it is a critical safety concern that demands immediate attention. When this warning light remains illuminated, it indicates that one or more tires may be underinflated, which can severely compromise the vehicle's handling and braking capabilities. This situation increases the likelihood of accidents, particularly in emergency scenarios where quick response is essential. Furthermore, driving on underinflated tires accelerates uneven wear, leading to premature tire replacement, which can be a costly oversight. Additionally, low tire pressure negatively impacts fuel efficiency, resulting in higher fuel costs over time. Ignoring this warning can also lead to significant tire damage, including the risk of a blowout while driving. Therefore, it is crucial for DIY enthusiasts to regularly check tire pressure, inflate tires to the manufacturer’s recommended levels, and inspect for any leaks or punctures. By taking these proactive steps, you can ensure not only your safety but also the longevity and performance of your vehicle.

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