What happens when you reset the tire pressure sensor

Your Subaru's tire pressure monitoring system (TPMS) watches each tire's air pressure and alerts you when one drops below the target. When you add air, rotate tires, or replace a tire, the sensor needs to be told that the pressure is now correct — this is the reset. Without it, the warning light stays on even though your tires are fine.

The reset process differs slightly depending on your Subaru's model year and whether you have a button in the cabin or need to use the steering wheel controls. The good news is that you do not need a dealer or special equipment. You can do this yourself in a few minutes.

Key Takeaways

  • Most Subarus have a TPMS reset button under the steering wheel or accessible through the dashboard menu, depending on the year.
  • You must inflate all four tires to the correct pressure (found on the driver's door jamb sticker) before you reset.
  • The reset process takes less than a minute and clears the warning light once the system recognizes the new pressure readings.
  • If the light returns after reset, one tire may have a slow leak or the sensor itself may be faulty.

Check your tire pressure first

Before you reset anything, inflate each tire to the pressure printed on the sticker inside your driver's door jamb. This sticker shows the correct cold pressure — measure your tires when they have not been driven for at least three hours, or first thing in the morning. Do not use the pressure printed on the tire sidewall itself; that is the maximum pressure, not the target.

Use a reliable tire gauge and add air at any gas station or tire shop. Check all four tires, including the spare if your Subaru has a TPMS sensor in the spare wheel. Once all tires are at the correct pressure, you are ready to reset.

Reset using the dashboard menu (2016 and newer)

Most newer Subarus let you reset the TPMS through the instrument cluster menu. Turn the ignition to the ON position without starting the engine. Use the steering wheel controls to navigate to the vehicle settings or tire pressure menu — the exact path depends on your model, but it is usually under "Settings" or "Vehicle."

Look for an option that says "TPMS Reset," "Tire Pressure Reset," or "Calibrate Tire Pressure." Select it and confirm. The system will take a few seconds to register the new pressure readings. Once complete, the warning light should turn off. If your Subaru does not have this menu option, move to the button method below.

Reset using the TPMS button (2015 and older)

Older Subarus have a physical reset button, usually located under the steering wheel on the left side of the dashboard, or sometimes on the dashboard itself near the steering column. Consult your owner's manual if you cannot find it — the exact location varies by model year.

With the ignition in the ON position (engine off), press and hold the TPMS reset button for three to five seconds until you see the tire pressure warning light blink twice. Release the button. The system is now reset. Start the engine and drive for a few minutes so the sensors can read the tire pressures and confirm the reset is complete.

What to do if the warning light returns

If the tire pressure warning light comes back on after a successful reset, one of your tires is losing air. Check all four tires again with a gauge — one will be noticeably lower than the others. Inflate it to the correct pressure and reset again.

If the light returns a second time on the same tire, that tire likely has a slow leak or puncture. Have it inspected by a tire shop. If the light keeps returning on different tires or will not turn off at all, the TPMS sensor itself may be faulty and need replacement — this is a job for a Subaru dealer or independent shop with TPMS diagnostic equipment.

When to reset after tire service

You need to reset the TPMS after rotating your tires, because the sensors stay with the wheels and the system needs to relearn which sensor is in which position. Reset when ready after rotation, before you drive home.

If you replace a tire, the new tire will have a new sensor (or the old sensor moved to the new wheel). Inflate it to the correct pressure and reset the system. If you only patch a tire and do not replace it, reset after the repair is complete and the tire is back to the correct pressure.

Frequently Asked Questions

Can I reset the TPMS while the engine is running?

No. The ignition must be in the ON position with the engine off. If you start the engine before the reset is complete, you may need to turn everything off and start over. Some Subarus will not let you access the reset menu while the engine is running.

Why does my tire pressure warning light stay on after I reset?

The most common reason is that one tire is still below the correct pressure. Check all four tires with a gauge and inflate any that are low. Also make sure you waited long enough after driving — tires heat up and pressure rises, so measure when they are cold. If all tires are correct and the light persists, the sensor may be defective.

Do I need to reset the TPMS every time I add air to a tire?

No. You only reset after you have finished adjusting all tire pressures to the correct level. If you add a small amount of air to one tire during normal maintenance, the system will adjust on its own over the next few minutes of driving.

What if I cannot find the reset button in my Subaru?

Check your owner's manual for the exact location — it varies by model year and generation. If your manual is not available, search online for "[Your Subaru model year] TPMS reset button location." If your Subaru is newer than 2016, you likely use the dashboard menu instead of a physical button.