Tire Low Pressure Warning Light
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2nd gear
Joined: Sep 2024
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Tire Low Pressure Warning Light LS430
Tire Low Pressure Warning light. Tires are all set at 33 lbs. I reset the warning light. As soon as I travel on a highway the low tire warning comes back on.
2005 LS430.
2005 LS430.
Last edited by LarryRedwing; Sep 28, 2024 at 09:08 AM. Reason: Add Model
Pit Crew
Joined: Feb 2017
Posts: 208
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From: New York
You don't say what vehicle or year which could help.
TPMS sensors in the tires have a lifespan around 10 years, give or take a couple of years. In one of my cars the warning light went off on the highway an hour into a 1,200 mile trip. I pulled on the shoulder expecting to see an issue, but all the tires had good pressure when checked with a gauge. It went out but came back on a while later. Turns out the battery in the 9 year old sensor was weak and needed to be replaced.
Also, the warning light will come on if the tire pressure is too high, as well as low. The tire pressure is set when the tire is cool and out of sunlight, usually I do mine in the morning. Also realize that as you drive pressure will go up. Setting at 33 in cool morning, it can go up 3-5 psi when driven and exposed to the sun.
Newer cars get around this issue by using the cars computer and ABS system using the tires rotation to calculate tire pressure. No more TPMS sensors in the wheels.
TPMS sensors in the tires have a lifespan around 10 years, give or take a couple of years. In one of my cars the warning light went off on the highway an hour into a 1,200 mile trip. I pulled on the shoulder expecting to see an issue, but all the tires had good pressure when checked with a gauge. It went out but came back on a while later. Turns out the battery in the 9 year old sensor was weak and needed to be replaced.
Also, the warning light will come on if the tire pressure is too high, as well as low. The tire pressure is set when the tire is cool and out of sunlight, usually I do mine in the morning. Also realize that as you drive pressure will go up. Setting at 33 in cool morning, it can go up 3-5 psi when driven and exposed to the sun.
Newer cars get around this issue by using the cars computer and ABS system using the tires rotation to calculate tire pressure. No more TPMS sensors in the wheels.
Thread Starter
2nd gear
Joined: Sep 2024
Posts: 2
Likes: 0
You don't say what vehicle or year which could help.
TPMS sensors in the tires have a lifespan around 10 years, give or take a couple of years. In one of my cars the warning light went off on the highway an hour into a 1,200 mile trip. I pulled on the shoulder expecting to see an issue, but all the tires had good pressure when checked with a gauge. It went out but came back on a while later. Turns out the battery in the 9 year old sensor was weak and needed to be replaced.
Also, the warning light will come on if the tire pressure is too high, as well as low. The tire pressure is set when the tire is cool and out of sunlight, usually I do mine in the morning. Also realize that as you drive pressure will go up. Setting at 33 in cool morning, it can go up 3-5 psi when driven and exposed to the sun.
Newer cars get around this issue by using the cars computer and ABS system using the tires rotation to calculate tire pressure. No more TPMS sensors in the wheels.
TPMS sensors in the tires have a lifespan around 10 years, give or take a couple of years. In one of my cars the warning light went off on the highway an hour into a 1,200 mile trip. I pulled on the shoulder expecting to see an issue, but all the tires had good pressure when checked with a gauge. It went out but came back on a while later. Turns out the battery in the 9 year old sensor was weak and needed to be replaced.
Also, the warning light will come on if the tire pressure is too high, as well as low. The tire pressure is set when the tire is cool and out of sunlight, usually I do mine in the morning. Also realize that as you drive pressure will go up. Setting at 33 in cool morning, it can go up 3-5 psi when driven and exposed to the sun.
Newer cars get around this issue by using the cars computer and ABS system using the tires rotation to calculate tire pressure. No more TPMS sensors in the wheels.
2005 Does not have tpms sensors and works off the abs. I would start by using a temp gun on each wheel and see if one is noticeably hotter than the wheel on the other side. It’s common to have a sticking caliper causing that wheel to slow down causing the tmps light. That’s the easy fix. If that’s not it you will need to trouble shoot from there
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