Lexus GS350 Tire Pressure Warning Light Stays On

Common Causes for the Tire Pressure Warning Light in Your Lexus GS350 and How to Resolve Them

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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 GS350 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 GS350 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 GS350

When addressing the tire pressure warning light in your Lexus GS350, begin by checking the tire pressure in all four tires. Use a reliable tire pressure gauge to ensure each tire is inflated to the manufacturer's recommended PSI, as incorrect pressure is often the primary cause of the warning light. If the pressure is correct, the next step is to reset the Tire Pressure Monitoring System (TPMS). This can be done by turning the ignition to the "ON" position and pressing the TPMS reset button until the warning light blinks three times. After releasing the button, start the vehicle and allow the system about 20 minutes to refresh. If the light remains on, consider taking your Lexus for a short drive, as sometimes the system can reset itself during normal operation. Lastly, consult your owner's manual for specific instructions related to your model, as the reset process may vary depending on whether your vehicle uses a direct or indirect TPMS. By following these steps, you can effectively troubleshoot and resolve the tire pressure warning light issue, ensuring your vehicle remains safe and road-ready.

Troubleshooting Tire Pressure Warning Light in a Lexus GS350

When dealing with the tire pressure warning light in a Lexus GS350, it's essential to recognize the common problems that could trigger this alert. One frequent issue is a slow leak in one or more tires, which can lead to a gradual loss of pressure that may not be immediately noticeable. Additionally, temperature fluctuations can affect tire pressure; colder weather often results in lower PSI readings, prompting the warning light to illuminate. Another possibility is a malfunctioning tire pressure sensor, which may fail to accurately read the tire pressure or could be damaged during tire changes or repairs. Furthermore, if the tires have been rotated or replaced, the TPMS may need recalibration to ensure it accurately reflects the new tire positions. Lastly, a dead battery in the TPMS sensor can also cause the warning light to stay on. By understanding these common issues, DIYers can better diagnose and address the tire pressure warning light in their Lexus GS350, ensuring safe and efficient driving.

Why is the Tire Pressure Warning Light Staying On in a Lexus GS350?

When the Tire Pressure Warning Light remains illuminated in your Lexus GS350, it is crucial to address the issue without delay. Ignoring this warning can lead to unsafe driving conditions, including reduced traction and increased risk of tire blowouts, which can result in accidents. The light may indicate low tire pressure, which can stem from temperature changes, new tires, or even a flat spare tire. Additionally, a malfunctioning Tire Pressure Monitoring System (TPMS) sensor, often caused by dirt, corrosion, or age, can also trigger the warning. If the sensors are damaged or not functioning correctly, they may fail to monitor tire pressures accurately, putting you at further risk. To ensure your safety, regularly check the tire pressure in all tires, including the spare, and inspect the TPMS sensors for any signs of damage. If the light persists after correcting tire pressures, resetting the TPMS system may be necessary. By taking these steps promptly, you can maintain optimal vehicle performance and ensure a safer driving experience.

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