2007 ES350

So my TPMS light comes and goes. I noticed that when the weather gets warmer, the light turns off. I checked all the tires and they are at the correct PSI

is there some science behind this? Someone told me the caps on my tires are a different color which indicates I have nitrogen filled tires? Does this make sense?

 

Check your spare, the TPMS module for that tire is also read and reported by the car.

 

Thanks- it has the correct amount of air

I'm going to deflate/inflate all the tires and use regular air instead of nitrogen air. I think the tires are currently inflated with nitrogen air which is what is causing the issue in cold weather

I found this online

https://www.vehicleservicepros.com/s...ogen-inflation

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Someone may have pushed the reset button when the tire pressure was set high. Now that you are filling them correctly when it gets cold they will drop even lower triggering the light.

 

I did try resetting the light before putting air in the tires...sigh

Is there a resolution? Thanks

 

Considering regular air fluctuates more that article makes little sense.
If adjusting the pressures including the spare and hitting the reset button did not help the only other option I would try is have a tire shop relearn the entire system.

 

How old are the sensors. Have them checked . Batteries only last around 7 years . A tire store can check the batteries.

 

I had the same problem. I did not know I had a full sized spare tire. My spare tire was below the 28 psi, so once I filled that up my TPMS light went off.

Check if you have a full sized spare tire, check if the button is toggled below the passenger seat too