Tire Pressure Sensor

11829 Views 9 Replies 8 Participants Last post by hubadub, Dec 1, 2015

RCSPAIN9

Discussion Starter · Nov 17, 2015

Hello everyone, I am new to the forum. I've had my RC350 for about 3 months now. Love it. I did not drive it for about two days and the weather here in California is getting a bit chili as of late. I noticed my Tire Sensor light came in and the PSI on the front wheels read 35 each and the ones in the back are yellow at 30. Should i be worried? has anyone encountered the same problem?

Thanks in advance.

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Lexinator

· #2 · Nov 17, 2015

Here's the online owner's manual for the RC350: http://drivers.lexus.com/t3Portal/document/om-s/OM24636U/pdf/OM24636U.pdf

Page 614 is where the tire pressures are listed. Not too sure but your rear tires could be under-inflated.

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soarer

· #3 · Nov 17, 2015

That drop in pressure isn't bad at all for the change in temperature.

If it dropped by more then I would be concerned and start looking for a possible slow leak.

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RCSPAIN9

Discussion Starter · #4 · Nov 18, 2015

Thank you guys for the response. I will go today and add some air and see if it drops again dramatically. Appreciate it

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DCRH

· #5 · Nov 18, 2015

If you want to look for a leak just to be on the safe side, filling the tire up with air, even overfilling by 5-10 psi, and spraying the tire with soapy water will help show where a leak is. You`ll notice a leak by where bubbles start to form.

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Canesfan

· #6 · Nov 19, 2015

My car experienced the exact same thing after a few days of sitting in the garage paired with a drop in temperatures. Happened to bring it to the dealership for this, and they said (yawn), that this was a VERY frequent occurrence, and was "normal". BTW, so much for nitrogen-filled tires making a hill-beans worth of difference.

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soarer

· #7 · Nov 19, 2015

Canesfan said:
My car experienced the exact same thing after a few days of sitting in the garage paired with a drop in temperatures. Happened to bring it to the dealership for this, and they said (yawn), that this was a VERY frequent occurrence, and was "normal". BTW, so much for nitrogen-filled tires making a hill-beans worth of difference.

It's one of the reasons i've seen folks opt completely out of going nitrogen since you can't just top it up with regular air.

For me it's just way too easy to find and fill up on air, just about every gas station has an air pump which only cost you some quarters, can't beat that.

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mrjangle

· #8 · Nov 23, 2015

Lower temps = lower PSI. I always fill my tires about 5 PSI above the recommended during the colder months. 5 below to 5 above normal is safe. Too much more than that and you'll start getting uneven tire wear.

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GearHeadPeter

· #9 · Dec 1, 2015

Always check your tire pressure when the tires are cold and out of direct sunlight. The sun will heat up one side by about 5 PSI the same as checking them after driving, and you will have not have enough air in your tires.

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hubadub

· #10 · Dec 1, 2015

I'm in So Cal too and experienced the exact same thing the other day when it was "Cali Cold". No sensor warning once it started warming up. Pretty sure you're fine.

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