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2013년식 · L33 (2012-2018) · 2.5 자동
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2026. 7. 1. 작업
난이도 & 준비물
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I have 2013 Nissan Rogue. I live in Toronto, Canada, so it is very cold here right now. I understand that cold temperatures can cause the tire pressure light to come on, but will it actually affect the reading if I use a pressure gauge (I think that's what it's called) to check the tire pressure? For example, the recommended PSI is about 40 I believe. On Saturday, the tire pressure in all four tires was pretty low so I filled them all up to 41. Now, after leaving my car outside for about two hours, the tire pressure light came on when I started up my vehicle, so I manually checked the pressure
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Physics says: T2 p2 = (p1+p0) * ---- - p0 T1 If you have temperature T1 and pressure p1 when you filled the tires, you can calculate the new pressure p2 when the temperature changes to T2 . Since pressure is measured relative to ambient air pressure, you also need that pressure p0 . Though there are changes in ambient air pressure, they are usually not that large as it could play a role here. Now, pressure can be given in any unit (since you're using psi, p0=14.7psi at sealevel), but temperature must be given in an absolute scale, i.e. in Kelvin. And of course, the temperature is the temperature of the tire - it warms up while driving! You can now calculate if the pressure drop makes sense. I've done it graphically: A drop from ~41psi to 30psi needs a temperature drop of about 60°C / 110°F, which is quite much. But Toronto had 0°C last saturday, now it's -15°C and if you topped your tires then, you would now have about 37.5 psi. Consider the tires had 10°C then and are cold now, you wo
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