2006 LS 430 Low Tire Warning Light
Thread Starter
2nd gear
Joined: Jan 2026
Posts: 2
Likes: 0
2006 LS 430 Low Tire Warning Light
This warning light comes on even though the tires are properly inflated, including the spare.
When I take the car to Big 0 tires to be rotated, they first try to tell me that I need new sensors. This model and year does not have sensors on the tires.
After convincing them that they cannot sell me tire sensors, they are able to reset the system so the light goes away.
However, the first time that I drive it on the freeway at speeds 55 mph or higher the light comes back on again.
How can I fix this?
When I take the car to Big 0 tires to be rotated, they first try to tell me that I need new sensors. This model and year does not have sensors on the tires.
After convincing them that they cannot sell me tire sensors, they are able to reset the system so the light goes away.
However, the first time that I drive it on the freeway at speeds 55 mph or higher the light comes back on again.
How can I fix this?
2nd gear
Joined: Jan 2026
Posts: 2
Likes: 1
Explaining the early TPMS
Lexus in their early days used Wheel speed, measured by the ABS system. If you have a tire that is low on pressure, it will need to spin faster to keep up with the car, therefore triggering a light that the system thinks the tire is low on air. If all of your tires are identical in size, and pressured exactly the same, then likely the problem is with the sensor, rather than the tire or wheel. In order to reset it, there is a button underneath the dash that wants the tires are all of the correct pressure and size, you reset the button so the system has a baseline to measure from.
Advanced
Joined: Jun 2014
Posts: 712
Likes: 237
From: UT
@1ls430ul , good stuff, I didn't know how they worked.
I do know they can be annoying and we mostly got by fine without them, I have one on my RX that is broken and I just don't care. They are a by-product of the Ford-Continental-Firestone lawsuit.
Additionally one thing to note is that temperature and altitude can set them off. When I moved to Utah where we are constantly driving between 4000-7000 ft. in dry air, the dealership warned me in the winter my TPS lights would be falsing on me. It isn't all the time, but he was right, they do occasionally. Then refer to the reset button. If you have the smartkey system, that button is right next to it, so you will need to feel it out or put your camera in selfie mode and point under the dash.
I do know they can be annoying and we mostly got by fine without them, I have one on my RX that is broken and I just don't care. They are a by-product of the Ford-Continental-Firestone lawsuit.
Additionally one thing to note is that temperature and altitude can set them off. When I moved to Utah where we are constantly driving between 4000-7000 ft. in dry air, the dealership warned me in the winter my TPS lights would be falsing on me. It isn't all the time, but he was right, they do occasionally. Then refer to the reset button. If you have the smartkey system, that button is right next to it, so you will need to feel it out or put your camera in selfie mode and point under the dash.
Last edited by CA2WALS430; Mar 29, 2026 at 07:48 AM.
Racer
Joined: Mar 2018
Posts: 1,282
Likes: 384
From: ESSEX, UK
When you are hitting the Reset button, watch the display and make sure that it says "Initializing" before you let go of the Reset button.
Until it says that you have NOT reset the Tyre Pressure system.
Once reset, it will "learn" the rolling radius of each tyre over the next 50 miles.
If you live somewhere with large temperature changes then you may need to Reset it in Spring or Fall to avoid it being triggered by temperature changes.
Also, if you drive at high altitude for some time it may also need a reset.
Until it says that you have NOT reset the Tyre Pressure system.
Once reset, it will "learn" the rolling radius of each tyre over the next 50 miles.
If you live somewhere with large temperature changes then you may need to Reset it in Spring or Fall to avoid it being triggered by temperature changes.
Also, if you drive at high altitude for some time it may also need a reset.
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Racer
Joined: Mar 2018
Posts: 1,282
Likes: 384
From: ESSEX, UK
Yeah, the reset button is in an awkward, impossible to see position.
As for why it didn't trigger, I have no idea unless it didn't get set/reset correctly in the first place.
On mine I set all 4 tyres to 32.0psi and then reset the system and went for a leisurely drive to complete the initialisation.
The warning popped up 2 years later and I pulled over immediately. By the time I had gotten out of the car the rear left tyre had completely deflated.
Something had torn a rip in the tread almost 1" long so I was very glad of the TPMS warning.
We never did find what caused it but the tyre was trashed and had to be replaced.
Since then I check my tyres manually twice per year and do the reset after each check.
My Kawasaki 1400 has tyre pressure sensors fitted and it shows the pressure on the dash.
That TPMS system has also save my *** on a couple of occasions, and a flat on a motorcycle is a LOT scarier than in a car.
On that system the standard pressure is 42psi and the TPMS shows the warning when it drops below 32psi.
As for why it didn't trigger, I have no idea unless it didn't get set/reset correctly in the first place.
On mine I set all 4 tyres to 32.0psi and then reset the system and went for a leisurely drive to complete the initialisation.
The warning popped up 2 years later and I pulled over immediately. By the time I had gotten out of the car the rear left tyre had completely deflated.
Something had torn a rip in the tread almost 1" long so I was very glad of the TPMS warning.
We never did find what caused it but the tyre was trashed and had to be replaced.
Since then I check my tyres manually twice per year and do the reset after each check.
My Kawasaki 1400 has tyre pressure sensors fitted and it shows the pressure on the dash.
That TPMS system has also save my *** on a couple of occasions, and a flat on a motorcycle is a LOT scarier than in a car.
On that system the standard pressure is 42psi and the TPMS shows the warning when it drops below 32psi.
Instructor
Joined: Sep 2014
Posts: 856
Likes: 71
From: State
not sure about this but
any time the wheels are off the ground the system must be reset
I believe that even if one wheel is raised off the ground the system must be reset
must be reset after tire rotation
any time the wheels are off the ground the system must be reset
I believe that even if one wheel is raised off the ground the system must be reset
must be reset after tire rotation
Racer
Joined: Mar 2018
Posts: 1,282
Likes: 384
From: ESSEX, UK
Only needs to be reset when you want the system to learn new tyres or tyre pressures.
Wheel off the ground makes no difference, but if you fit the spare wheel then reset.
The rolling radius of the tyre changes with a change in pressure.
The system learns the rolling radius of the tyre and alerts you when it changes.
Wheel off the ground makes no difference, but if you fit the spare wheel then reset.
The rolling radius of the tyre changes with a change in pressure.
The system learns the rolling radius of the tyre and alerts you when it changes.
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