This was a real problem with my Titan, but living in a higher altitude does not help either. What pressure are you running? I would run 39 in the front and 37 in the back on stock tires, now it's like 35 front 32 back with the new BFG's. A little higher than OEM should take care of the problem.

 

I have had teh same problem Since saturday night. The light turned on and still has not gone out, and all of the tires are at 31psi.

 

did you check the spare?:willy_nilly:

 

TPMS is simply an area of problems on this truck. If you are experiencing your first cool weather of the season, then that is likely your culprit. It should go off soon. If not, it may be time to visit the dealer. I do not believe the spare has sensors in it.

 

it is starting to cool down which means less air pressure. i would go about 2-3 over OEM to make sure it isn't a boarderline reading. remember in the morning or when the tires aren't warm they have less pressure in them, so if this is the case it will throw the light until it warms up and the pressure increases. throw in the fact that the sensors are accurate to +/- about 5 psi ive heard. so air up a little bit and you should be alright. if it is constantly on check the pressure in all the tires and make sure you have nothing that would cause a flat. if all of that is fine and dandy then take it in as it is most likely a faulty sensor.


even if the spare tire had a sensor on it, the computer wouldnt read it because it is not in motion, so the spare isnt an issue.

 

Anyone know at what pressure it is suppose to go on?

 

I have had teh same problem Since saturday night. The light turned on and still has not gone out, and all of the tires are at 31psi.

According to the sticker on the driver's door jamb, the pressure is supposed to be 35 psi alll the way around. My warning light came on last week, and the tires were all 30-31 psi. I went back to 35 psi and the light went off the next time I drove it.

did you check the spare?:willy_nilly:

There's no TPMS sensor on the spare.

 

mine comes on all the time I can only figure its because of rapid temperature changes or something

 

I have had teh same problem Since saturday night. The light turned on and still has not gone out, and all of the tires are at 31psi.

If the reccomended pressure is 35........yours are at 31 with the light on.......why does that not ring a bell with you???

 

You should NEVER run your tires lower than 35 PSI on the road!!!!! I am in the tire manufacturing business and I would not run any of mine below that, on any vehicle, no matter what the manufacturer suggests.

 

i've posted before on this feature and bashed it for being inaccurate. well, i stand corrected because this sucker is dead on. i've had a slow leak on one of the rear tires and it keeps dropping in psi. i run my tires at 38psi.

 

ya know overinflation can damage your tires just as well as underinflation.

 

mine comes on all the time I can only figure its because of rapid temperature changes or something

Ben, all of the TPMSs' are calibrated at sea level so for us in the higher elevations we have to put more pressure in the tire to compensate for the lose of pressure due to the altitude!! I was told by the dealer to keep the tires at around 40psi in the winter, especially if it is parked outside over night, and somewhere around at least 35 in the warmer months This is supposidly the "magic numbers" for us in altitude.

Anyone know at what pressure it is suppose to go on?

I believe in the manual it says the monitor will trip at 26 or 27 psi.

 

So no one knows how to turn this light off? TOYOTA has a reset button in the glove box, I looked in the owners manual for almost 20 minutes and was sent to chapter to chapter to no avail and then to the door sticker still to no avail. WTF!

 

the light goes off by itself when the tires are at or above the correct tire pressure. if its still on check your tires again when they are cold. or just fill them to 40 or so psi start the truck and drive around town till it goes off then air down to 35psi when cold. should solve the light problem.

 

Trying something like this would help with a wonky TMS.

http://www.theautochannel.com/news/2006/04/17/004282.html

Nitro-Nized tires maintain proper pressure up to three times longer because nitrogen diffuses through tire walls more slowly than air.

This gives drivers several important safety and performance advantages:

* Problems associated with under-inflation are reduced. Under-inflated tires run hotter and wear faster due to increased rolling resistance. A tire that is 10 percent under-inflated will lose approximately seven percent of its service life.

* Tires maintain their strength longer. Nitrogen-filled tires show twice the life to failure in both field and laboratory tests due to absence of interior oxidation caused by the oxygen in compressed air.

* Tires perform better. Nitrogen can help increase tire mileage by as much as 25 percent. Tires that are properly inflated respond better to steering input and handle better.

* Tire pressure is more consistent. Compressed air expands at varying rates depending on the amount of water vapor it contains; nitrogen is "dry" and expands at a consistent, predictable rate.In addition, nitrogen tire inflation is better for your wallet and better for the environment. Belle Tire estimates customers can save up to $125 per year in vehicle operating costs if they Nitro-Nize their tires, depending on the number of miles driven annually. On a larger scale, Americans could save 3.7 billion gallons of gas per year if they maintained proper tire pressure with nitrogen.

I hear Costco is filling tires with Nitrogen for ~$20 here in Florida.

 

yeah, or we could all just stop being lazy and check tire pressure more often. if you maintain pressure with air, you'll see the same benefits as using nitrogen, you just have to actually check it. air is 78% nitrogen anyway isnt it?

and if you wheel...

 

Nitrogen

I saw one of those brochures at the tire shop last friday. According to the brochure, having your tires filled with nitrogen will save fuel, is this accomplished by keeping the recommended pressure or does the nitrogen make the tires lighter?, does anybody have nitrogen in their tires?

 

I run nitrogen in my tires (just because I have access to it), my alarm still goes off when the temperature outside drops below around 15 degrees or so. I don't see any increase in fuel mileage, but pure nitrogen is more stable and won't have the fluctuations in temperature that air will. Hopefully that will translate into longer life, but that remains to be seen. It definitely has an effect on larger tires, such as tires for a semi truck, but for a smaller tire who knows.

The alarm will reset itself if I run it on the interstate for 5 minutes or so.