In most Lexus IS250 models, resetting the tire pressure monitoring system (TPMS) involves inflating all tires to the recommended cold pressures and performing the vehicle’s relearn procedure. Depending on the year and trim, you may have a TPMS reset switch or you may simply need to drive to complete the relearn. This guide covers both common methods and what to do if the warning light persists.
Understanding the TPMS on the IS250
The TPMS uses sensors in each wheel to monitor tire pressure. When a tire is underinflated, the warning light on the dash illuminates. A reset is essentially teaching the system the correct reference pressures after you adjust air pressures or replace tires. Some IS250 models have a dedicated reset switch; others rely on a driven relearn, which occurs automatically as you drive with properly inflated tires.
Method A: Reset with TPMS reset button (if equipped)
Use this method if your IS250 has a dedicated TPMS reset button. The reset process trains the system to the current tire pressures.
- Ensure all tires are cold and inflated to the recommended pressures listed on the door jamb placard.
- Turn the ignition to ON with the engine OFF.
- Locate and press and hold the TPMS reset button until the TPMS warning light in the instrument cluster blinks slowly (about three times).
- Release the button and wait for the light to stop blinking, then turn the ignition off and back on to confirm.
- Drive at 30–50 mph (50–80 km/h) for about 10–20 minutes to complete the relearn.
The reset button method reprograms the sensors to the current tire pressures. If the warning light remains after this procedure, the system may require professional diagnosis or there could be a faulty sensor.
Method B: Driven relearn (no button)
Some IS250 models do not include a TPMS reset switch. In those cases, the system relearns by driving after inflating the tires to specification.
- Inflate all tires to the door jamb recommended cold pressures.
- Start the engine and drive the vehicle at speeds above 30 mph (50 km/h) for 10–20 minutes, maintaining steady speeds when possible.
- After the drive, the TPMS light should turn off if the sensors have relearned successfully.
If the light stays on after a full highway drive, the sensors may be faulty, a tire may have a slow leak, or there could be another issue requiring inspection by a tire or Lexus specialist.
Troubleshooting common issues
These checks help when the TPMS light behaves unexpectedly or stays on after the relearn attempts.
- Double-check all tires are inflated to the exact recommended pressures, including the spare if your system uses it.
- Inspect tires for slow leaks from punctures, nails, or damaged valves.
- Verify wheel/tire sizes and rotation history align with the vehicle’s requirements; mismatched tires can trigger TPMS warnings.
- Consider the age of the TPMS sensors; battery life typically spans 5–10 years, after which sensors can fail.
- If the light persists, seek professional service for a diagnostic relearn and sensor testing at a tire shop or Lexus dealership.
Persistent TPMS warnings indicate a potential sensor or system fault that should be addressed to maintain accurate tire pressure monitoring.
When to seek professional help
If you cannot get the TPMS to relearn after following the steps above, or if you suspect a faulty sensor, corroded valve stem, or damaged wiring, a dealership or qualified tire service center can perform a professional TPMS diagnosis, sensor replacement, or battery service as needed.
Summary
Resetting the TPMS on a Lexus IS250 generally involves inflating all tires to the recommended cold pressures and using either the TPMS reset button (if equipped) or driving the car to complete a relearn. If the warning light remains after these steps, or if you notice any tire leaks or sensor issues, seek professional service to diagnose and resolve the problem. Regularly maintaining correct tire pressures improves safety, handling, and fuel efficiency.
Have a 2020 Lexus IS250, how do I get tire pressure to show on screen?
That. Once you click on it it's going to bring up a little picture for you. And show you the PSI of each tire.
Why does the TPMS on the Lexus IS250 light not shut off and not read tire pressure?
The most common reasons a Lexus IS250 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.
Where is the TPMS reset button in Lexus?
So I'm just going to press that with my finger. And as I press. It. What I'm going to do is I'm going to press it. Now i'm pressing and holding it that switch. And now you can see it's flashing.
How do I manually reset my tire pressure sensor?
Process will begin if there's no button the procedure is done with the display audio. Begin by pressing the home. Button then touch settings touch vehicle next and then TPMS calibration.