These instructions apply to the Lexus LC Mk1 (Z1) 2018-Present.
For other models, please choose your vehicle here.
If the tyre-pressure warning has come on in your Lexus LC (2018–present) after you’ve adjusted the pressures or changed a wheel, you reset the monitor with the TPMS SET button. Here’s how.
The amber horseshoe-with-exclamation symbol on the LC is a reminder, not a fault warning. It lights when the pressure the car measures no longer matches the reference it holds in memory — exactly what happens after you inflate the tyres, rotate them, or fit a different set of wheels. Set the correct pressures, store them with the SET button, and the light goes out.
How the TPMS works on the LC
The LC uses a direct system: each wheel has a small battery-powered sensor at the valve that reports its real pressure to the car. The SET button doesn’t repair anything — it tells the car to accept the pressures it’s reading right now as the correct baseline. Because the sensors measure actual pressure, the warning returns if a tyre genuinely runs low, so always inflate accurately before you store.
Before You Start
- Check the tyres cold — before driving or after a few hours parked. Warm tyres read high and skew the baseline.
- Set all four to the figure on the driver’s door-pillar placard; a fully loaded car may use a higher figure.
- Include the spare if your LC carries one with a sensor.
- Have the car parked level and the ignition ready; you don’t need to start the engine.
Resetting the System
- Park level and set all four tyres to the correct cold pressures (placard in the driver’s door shut).
- Switch the ignition on (you don’t need to start the engine/hybrid system).
- Press and hold the TPMS ‘SET’ button (low on the dash near the steering column) until the TPMS warning light blinks (typically three times), then release.
- The system learns the current pressures as the new baseline; it finishes after a short drive.
If the Warning Stays On
- Recheck every tyre — one corner just below spec keeps the warning on and blocks the reset. A slow leak on a single wheel is easy to overlook.
- Hold the SET button until the light blinks — releasing early cancels the store and nothing is saved.
- Drive for a few minutes after pressing SET so every sensor wakes and reports its pressure.
- Watch for a cold morning — pressure drops about 1 psi per 5 °C fall, so a tyre set on a mild day can trip the light overnight.
- After a wheel change or fitting a space-saver, re-store once the road wheels are back; a temporary spare without a sensor can keep the light on.
- Still showing with correct pressures? A sensor may have a flat battery or have failed — look up the code on autodtcs.com.
What to Expect After
Once the SET button is accepted and the light blinks, the warning should go out within the first few minutes of driving as the sensors confirm the fresh baseline. After that the system stays quiet unless a tyre actually loses pressure. So if the light returns a few days later, take it as a genuine prompt to check for a slow puncture rather than a false alarm.
Frequently Asked Questions
How do I reset the tyre pressure light on a Lexus LC?
Set all four tyres to the correct cold pressures, switch the ignition on, then press and hold the TPMS SET button (low on the dash near the steering column) until the warning light blinks, typically three times. Release it and drive for a few minutes; the current pressures become the new baseline and the light clears.
Where is the TPMS SET button?
Low on the dashboard near the steering column, often below or beside the instrument panel. It’s a small dedicated button, sometimes marked with the tyre-pressure symbol. Your handbook shows the exact spot for your car; the blink of the warning light confirms you’ve pressed and held the right control.
Why won’t the warning clear?
Usually one tyre is still below the placard figure, or the SET button wasn’t held until the light blinked. Re-check each tyre cold with an accurate gauge, correct any that are low, then repeat the store and drive a short distance. If every pressure is right and it still won’t clear, suspect a weak or failed sensor.
Do I need a tool?
No. A normal reset after inflating or a wheel swap is done from the driver’s seat with the SET button alone. A workshop tool is only needed when a sensor is replaced, so its ID can be taught to the car. For routine pressure adjustments you never need one.
Why did the light come on in cold weather?
As the temperature drops, the air in each tyre contracts and the pressure falls — roughly 1 psi for every 5 °C. An LC set correctly in mild weather can dip below the threshold on the first cold morning. Top the tyres up to the placard figure while cold, then re-store with the SET button.
Do I have to reset it after rotating the tyres?
Yes, it’s worth doing. Rotating moves sensors between axles, and front and rear pressures can differ, so re-storing makes sure the car compares each wheel against the right target. Set the pressures for their new positions first, then press SET so the baseline matches where each tyre now sits.
If the warning came on with other lights, decode the code on autodtcs.com.
Independent guide — not affiliated with Lexus. Always follow your official service manual and safety precautions. Read our full disclaimer.