What is the tire pressure warning light on a Lexus 350?

The tire pressure warning light on a Lexus 350 is the TPMS indicator. It shows as a yellow icon resembling a tire with an exclamation point inside and signals that one or more tires are underinflated or there’s a fault in the Tire Pressure Monitoring System.

In this article, we explain what triggers the warning, how to respond safely, how to reset or relearn the system on common Lexus 350 models, and when it’s time to seek service. The guidance applies to popular variants like the ES350, RX350, and IS350, but procedures can vary by year and trim, so consult your owner's manual for exact steps.

What the tire pressure warning light means

The TPMS warning light is designed to help you maintain safe tire pressures, which affect handling, braking, and fuel economy. Lexus uses either direct TPMS sensors in each wheel or an indirect method that estimates pressure from wheel speed data, depending on model year and configuration. When pressure is too low or the system detects a fault, the warning light comes on.

Direct TPMS vs Indirect TPMS

Direct TPMS uses sensors installed in each tire to report actual pressures to the vehicle’s computer. Indirect TPMS uses wheel-speed signals to infer pressure differences and requires the system to be calibrated to distinguish normal loads from underinflation. Most newer Lexus 350 models use direct TPMS, but the exact setup can vary by year.

The light can also illuminate due to non-pressure issues, such as a faulty sensor, a dead battery in a sensor, or after rotating tires or changing tires without completing a relearn procedure.

Common reasons the TPMS light comes on include one or more tires being underinflated, a slow leak, a puncture, a recent tire rotation or replacement that requires relearning, or a TPMS sensor fault.

• One or more tires is underinflated relative to the recommended pressure (often affected by cold weather or a slow leak).


• A tire has a puncture or slow leak that reduces pressure over time.


• A TPMS sensor or its battery is failing, or the system detects a fault.


• Recent tire rotation, replacement, or a service that might require a TPMS relearn.

Driving with underinflated tires is dangerous and reduces fuel efficiency. If you see the light, stop and check tire pressures as soon as it is safe to do so.

What to do when the light comes on

When the TPMS warning light appears, take these steps to determine the cause and correct it safely:

• Check all tires with a tire gauge to ensure they are inflated to the recommended pressures, using the placard on the driver’s door jamb or the owner’s manual. Inflate cold tires to those specifications.


• Inspect tires for obvious damage, punctures, or slow leaks around the tread and sidewalls. Do not ignore signs of damage.


• If you inflate the tires to the listed spec and the light remains on, look for a slow leak or a faulty sensor; a shop can measure pressure and inspect the TPMS.


• If tires were recently rotated or replaced, complete the TPMS relearn procedure for your model year, or have the dealer perform it if you’re unsure.

After correcting tire pressures and completing any relearn, drive normally. The light should go off once the system has re-calibrated. If it stays illuminated, schedule service to diagnose a possible TPMS sensor fault or control-module issue.

Resetting or relearning the TPMS on a Lexus 350

Reset or relearn procedures vary by year and trim, so always consult the owner’s manual. Below are common approaches used on many Lexus models:

• Auto relearn by driving: Inflate tires to the recommended cold pressures, then drive at highway speeds for about 10–20 minutes. The system can automatically relearn the new pressures and the warning light should turn off once complete.


• Manual reset (if your model supports it): Some Lexus 350 variants provide a TPMS reset button (sometimes located under the dash, in the glove box, or near the steering column). With the ignition on, press and hold the button until the TPMS indicator blinks or a confirmation is shown, then drive to complete relearn.


• Dealership or tire shop: If the light remains after attempting relearn, a professional diagnostic can identify sensor faults, degraded valve stems, or other hardware issues.

Because steps can differ by model year, verify the exact procedure for your Lexus 350 in the manual or with a dealership before attempting resets.

Summary

The tire pressure warning light on the Lexus 350 is the TPMS indicator, alerting you to underinflation or a system fault. Always check tire pressures to the recommended values, inspect for damage, and perform a relearn if required by your model. If the light persists after these steps, seek professional help to verify sensors and system health. Regular maintenance helps ensure safe handling and optimal fuel efficiency.

What's the most serious Lexus warning light?

Red warning lights are the most serious and indicate critical issues, such as engine overheating or brake failure. Stop driving immediately if a red warning light appears.

How do I know which tire is low on my Lexus?

If you drive a Lexus from the last few generations, it likely includes a Tire Pressure Monitoring System. You can access the tire pressure levels in each of your tires through your driver display, and this system will alert you when it senses tire pressure is low in any of the tires, singling out the culprits for you.

How to reset lexus rx 350 tire pressure light?

To reset the Lexus RX 350 tire pressure light, first ensure all tires are inflated to the correct pressure, then use the TPMS reset button near the accelerator pedal or the infotainment system's "Vehicle Settings" menu to recalibrate the system. For models with a physical button, turn the ignition to the "ON" position, hold the button until the light blinks, then release. For models with a display screen, navigate to the TPMS section in the settings menu and follow the on-screen prompts to reset. 
For models with a physical reset button
This video shows how to reset the tire pressure light using a physical button: 1mDoctor ResetYouTube · Sep 23, 2024

1. Adjust tire pressure: Ensure all four tires, including the spare, are inflated to the recommended pressure listed on the sticker inside the driver's side door jamb. 
2. Turn ignition on: With the engine off, turn the ignition key to the "ON" position (do not start the engine). 
3. Locate the button: Find the TPMS reset button, which is typically located above the accelerator pedal. 
4. Press and hold: Press and hold the button until the TPMS indicator light on the instrument panel flashes three times, then release it. 
5. Wait for recalibration: The system will take a few minutes to relearn the tire pressures. 

For models with a display/infotainment system
This video shows how to reset the tire pressure light using the display menu: 53sPeanutButterManYouTube · Jun 5, 2025

1. Adjust tire pressure: Check and adjust the air pressure in all tires to the recommended PSI when the tires are cold. 
2. Turn ignition on: With the engine off, turn the ignition to the "ON" position (push the start button twice without pressing the brake pedal). 
3. Access the menu: Use the arrow keys on your steering wheel to navigate the multi-information display until you see the "TPMS" or "Tire Pressure" screen. 
4. Select reset option: Press the center button to access the menu, then navigate to "TPMS" or "Tire Pressure Maintenance System". 
5. Recalibrate: Follow the on-screen instructions to "Reset" or "Calibrate" the TPMS. You may need to press and hold the center button until the light blinks three times. 
6. Drive to complete: Drive the vehicle for a few minutes to allow the system to fully recalibrate. 

If the light remains on

• Check for leaks: If the light comes back on after a reset, it could indicate a slow leak in one of the tires. 
• Faulty sensor: A flashing tire pressure light can sometimes indicate a failing sensor or a bad sensor battery, which typically lasts 5 to 10 years. 
• Seek professional help: If the problem persists, have the system checked by a mechanic or dealership to diagnose a faulty sensor. 

Why is my tire pressure light on when my tires are fine in Lexus?

If the Lexus tire pressure light remains on after filling the tires, it's likely due to a bad TPMS sensor, a low battery in the sensor, or the system not being manually reset. You can try resetting the system yourself, but if that doesn't work, have the sensors checked at a tire shop. 
This video explains why your TPMS light might be on even after filling your tires: 58sDriveway DudesYouTube · Sep 1, 2022
Possible causes

• Faulty sensor: The sensor in one or more tires may have failed. These sensors have batteries that can last 5-10 years and need replacing. 
• Low sensor battery: The battery inside a TPMS sensor may be low, causing it to fail even if the tire pressure is correct. 
• Needs a reset: After adjusting tire pressure, the system often requires a manual reset. Driving for several miles may also trigger an automatic reset in some vehicles. 
• Temperature changes: Significant drops in temperature can cause tire pressure to decrease, triggering the light, especially if the pressure is already at the lower end of the acceptable range. 

You can watch this video to learn how to reset the TPMS system on your Lexus: 1mDoctor ResetYouTube · Oct 2, 2024
How to fix it

1. Manually check the pressure: Use a reliable tire gauge to ensure all tires are at the recommended pressure, which is listed on the sticker inside the driver's side door jamb. Don't just rely on the light's reading. 
2. Find and press the reset button: Locate the TPMS reset button, which is often found under the dashboard on the driver's side. The exact location varies by model. 
3. Reset the system: 
   • Turn the ignition to the "on" position without starting the engine. 
   • Press and hold the reset button until the indicator light blinks slowly three times. 
   • If your model has a display system, you may need to navigate through the menu to find the TPMS reset option. 
4. Drive for several miles: Drive at a consistent speed to allow the system to recalibrate and read the new pressure in each tire. 
5. Visit a tire shop: If the light is still on, the issue is likely a faulty sensor. A tire shop can quickly scan your tires to see which sensor needs replacement. This is often less expensive than going to a dealership. 

This video shows how to check the tire pressure in your Lexus: 58sKeith BladeYouTube · Mar 23, 2025