sjf

The low tire pressure came on today on our new 2011 IS350 when my fiance left for work this morning. Since I was at work and couldn't verify whether tire pressure was low, I told her to take the car to the dealer to have it checked. It turns out that the light comes on when there is a 6 pound variance on tire pressure (psi shoud be 36 lbs, tires were at 30 lbs). The dealer added 6 pounds of air, and also told us that cold weather can trigger the low pressure light to come on.

We live in the Sacramento valley, where temperatures aren't exactly frigid. My question is whether those of you living in truly cold climates have an issue with the low pressure light coming on frequently???

DubbStep

Yupp, this is true, Gotta love these sensors

Sffd103

iTrader: (16)

sounds like it was just a bit low. Yes, it happened to me and I just filled up when I got a chance. Sac gets a bit cold but I don't think it's the temp that'll make it register. Even though they will heat up while driving. Welcome to CL

dmLsix

PSI drops as the weather gets colder, it's a good idea to put in at least a couple extra PSI into the tires during colder seasons (winter).

chi123

iTrader: (12)

I put extra air in right before winter begins. It's not the best idea since over-inflating can be bad for snow traction and that stuff. My low pressure light comes on pretty frequently. Mostly it appears every 2 months or so right after a chilly day.

Those living in cold climates shouldn't have it coming too frequently if it stays cold all the time. Tires loose air anyways over time and when temps get a little colder and it drops below 30 or so PSI, then the light comes on.

GiantsFan

iTrader: (9)

I had mine go off a few days ago after a extremely cold night...

nosurprise

iTrader: (1)

Most people say that for every 10degrees temperature drop, the tire pressure will drop 1 psi, and for every 10degress increase, tire will increase by 1psi. The tire loses some air over time, and the lower temperatures probably push it over the warning trigger threshold.

aCortIS101

iTrader: (8)

Yea it happens... Started the car up this morning before work to the fluids going and the tpms sensor went off. The car has been sitting for a week and it was 9 degs out this morning... Soo yea you will see it go off on cold days

Silver10

It was 73* when i left for work this morning does that count as extreme cold? It got up to 81* by lunch time and my TPMS never went on.... I check mine frequently so i havent seen that light in quite some time.

sjf

To all,

Thanks for your feedback! The car is garaged, so I didn't think the pressure sensor would be that sensitive to weather. Then again, we've had the car 3 months and I hadn't checked the pressure yet(1,900 mles on the car now). I'll check the pressure weekly now.

Thanks again to everyone!

Vroomin350

iTrader: (28)

Gotta love Florida.

NafisC

Not to thread jack, but I have another question regarding TPMS. Is the TPMS warning a deletable OBDII code? I got new wheels, and don't feel like putting in new sensors at the moment, and the warning sign is annoying to view on the display screen in the dash. Thanks guys

aCortIS101

iTrader: (8)

Don't think soo. There is a thread somewhere around here about addressing this issue.. Forgot the name of it, but the sensors are placed into a small PVC pipe capped off on both sides and filled up with air... Kinda like a lil pipe bomb. If you get some extra sensors you can do that or get the stock ones removed from the stock wheels

aCortIS101

iTrader: (8)

Searched and found it....

https://www.clublexus.com/forums/is-...pipe-bomb.html

IS2FIFTY

iTrader: (5)

I usually fill up my tires every time the season change especially winter, and to answer your question about TPMS you can do the pipe bomb or you can do the spare tire trick both I heard worked heres the link https://www.clublexus.com/forums/is-...pare-tire.html