Tire pressure warning light is going off but the tires look fine

tettes

Same thing happened to me today.

I read this thread and my owner's manual before heading to the gas station to fix the problem.

Tires were all at about 27, so I bumped all four up to 35 and drove for about 1 minute at 35 or 40 mph before the warning light disengaged.

I've already ordered one of the tire pressure gauges that "dad" recommended.

Thanks, all!

ChrisSlicks

I've had that pressure gauge that dad mentions for a little over a year. Excellent gauge, extremely accurate. The bleed valve is nice as it lets you over-inflate your tires slightly with the compressor and then use the pressure gauge to obtain a precise pressure.

vipor

shouldn't be "a little above 30"

they should 35. period. get the tires warm before checking them.

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Lug

Mine trip in my 350Z at 29 lbs. so 30 doesn't seem an unreasonable point to trip at.

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ChrisSlicks

Yes, they trip right at 29 in my experience (despite the manual saying 27). Try to keep them between 32 and 35 cold.

And yes, Nitrogen changes volumetric pressure with temperature at the same rate as regular air, you have to adjust your tire pressures just as often as the rest of us. The main reason to use nitrogen IMO is to avoid the water vapor, which causes problem when the tire temperatures start reaching 140 degrees or more, i.e. when racing. On the street - it doesn't do diddly squat.

huoZian

I had the exact problem yesterday, and of course it was also the day I got my first oil change and service. This is Northern california and the weather was only about 45 at worse. I have been driving for about 80 miles intermittently. Stopped and checked the pressure right away when the light came one. I read the manual and it said that electronic interference can affect the sensor, and I was charging my GPS. After I unplugged it it as ok! I think it was because it was full charged but left plugged. I'll drive more in a couple of days but after I unplugged it I drove about 50 miles stop and go and also steady without the light coming on.

Dark_Sub_Rosa

Is it that hard to put the correct amount of air in the effin tire. The light is going to trip at 30, our G37 had 31 lbs and the light tripped so I put air in it. How lazy can you seriously be.

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TreeSemdyZee

Nitrogen, due to it's properties, does last longer. Does not leak as much air along with a whole lot of other benefits.

Nitrogen in Tires : Information about Nitrogen Tire Inflation News, Benefits, Generator Dealers, Location Finder & More


OP. Get your tires pumped up to 35 pounds cold, not warmed up. The pressures in my old 350 would fluctuate as much as 10 pounds due to temperatures. If I had the tires set to 35 when the temps were in the mid-60s, they would drop below 30 pounds when the temperatures dropped well below freezing. If the temps went into the 90s, they might go over 40 pounds when they got hot. It's the nature of air. It compresses when it gets cold (see turbocharging) and expands when it gets hot.
Nitrogen is not nearly as susceptible to these issues because of its molecular structure.
As far as slipping when it gets cold, performance tires get very hard when the temperatures drop and reduces traction. If you have Sports Package, those tires get ridiculously hard when it gets cold.

NYBladeZ

You're telling me, Those RE05's are not good in NY with the latest weather. This forum has also seen a few people wreck due to cold temperatures and aggressive driving with the tires giving out

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vipor

i thought Tony had RE11s? Maybe I'm crazy.

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2009 NISMO # 0193 | QAB | Albums! | 05.04.10 (Dynojet) 291.94hp/248.28tq
Oil Cooler (DIY) | Custom Headlights | GTSPEC Braces | F.I. Long Tube Headers

NYBladeZ

I usually care around one of those $3 pressure gauges usually check it out before I leave the garage

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2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold
2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

JB1

It's due to the lower outside temperature, every 10 degree drop in temp results in about 1 PSI drop in tire pressure.

Cold outside =Colder tires = less grip

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dandg

Will it go back up as the temperature goes up?

JB1

It should, but I wouldn't wait for it, just adjust it now and re-adjust when the temperature goes up again (if needed)

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ZKindaGuy

Geezuz...you don't exactly know how much the pressure read. You thought it read 30 but maybe it was 35.....you ask if its temperature related and might it go back up when the temperatures rise again.....you admit to not checking the tire pressure regularly.....you are not sure what to do.......

Let me ask you a question....why in hell did you buy a $40,000 car if don't even have a clue about something that is just down right common sense and don't seem the least bit motivated to do something above and beyond the making of excuses or waiting for the ambient temperatures to go up???!!!!

SIR,,,,,do that beautiful car a favor and take it back to the dealer and have them buy it back so they can find someone who really can appreciate what it is they will be buying....