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Yup. Happened to me last winter. Hasn't gotten that cold yet around here this year yet. Should be cold enough, if it's going to happen, in the next day or two.We have had our first single digit temperatures of the season the past few days. Today I had a low tire pressure warning. All 4 tires were at 39 lbs. I used my compressor to inflate all to about 44 lbs. Anyone else have this happen? I don't remember this last winter.
The fancy gauges need to be spinning to be read unfortunately.It is really rather annoying that you can't use these fancy pressure sensors as pressure gauges when filling the tires.
About 1psi per 10F change.I see a difference with even a 10 degree swing, so I now keep more of an eye on it.
40 degree drop - 4psi drop, 8K increase in altitude - 4psi increase in pressure (which the TPMS will not report correctly). As you say, it'll balance out at the low. At the high, you'll be 3psi up on where you were when you started. As tolerance is tight on the high end (50psi max on a 45psi recommendation) you're better starting low and letting the altitude increase the pressure for you than starting at 45 and hoping the temps keep it below 50! Of course with a 50psi max recommendation I am sure the tire is in no danger, but the handling will not improve with over-inflation on an already 'hard' tire.I am driving up to Mammoth next week, where the altitude is about 8,000' and the low temp is forecast for 32° high and 1° low. I expect my tire pressure will drop from the temp, but may go up and compensate a bit from the altitude, right?
Thank you for the info!40 degree drop - 4psi drop, 8K increase in altitude - 4psi increase in pressure (which the TPMS will not report correctly). As you say, it'll balance out at the low. At the high, you'll be 3psi up on where you were when you started. As tolerance is tight on the high end (50psi max on a 45psi recommendation) you're better starting low and letting the altitude increase the pressure for you than starting at 45 and hoping the temps keep it below 50! Of course with a 50psi max recommendation I am sure the tire is in no danger, but the handling will not improve with over-inflation on an already 'hard' tire.
Are you running 'all seasons'?
No reason why not air is almost 80% nitrogen anyway. That said my experience is that 100% nitrogen (well what Costco pumps) is MORE susceptible to temperature change - yes this is not supposed to be the case, but over multiple season on big SUV tires I found this to be a consistent probelem. It is supposed to be better in terms of reducing corrosion.Has anyone enquired with Tesla about the ability to use nitrogen in the tires?
My LEAF honks at me when I get to the correct pressure.Just the other day was getting complaints on three out of four tires. Added air, went away, but if it warms up they may be over pressure.
It is really rather annoying that you can't use these fancy pressure sensors as pressure gauges when filling the tires.
About 1psi per 10F change.
Also 0.5PSI per 1000ft of elevation - and note that the Tesla system does not compensate for altitude - so the pressures you aim for should be adjusted for the 'kind of ' altitude you are at - otherwise you are likely over-inflating them if you use the TPMS readings as your target.
We have had our first single digit temperatures of the season the past few days. Today I had a low tire pressure warning. All 4 tires were at 39 lbs. I used my compressor to inflate all to about 44 lbs. Anyone else have this happen? I don't remember this last winter.
Same on my 2015 S60 CPO - though sadly been back up and seemed to still consider one to be faulty - guessing the battery is dead. Off to Discount Tire soon to see if their toys can read the battery level on a Tesla TPMS (as they'll do it for free, not $125 per hour).Been down to single digits and -temps here as well, my tpms though simply does not work once it gets 15F or below so it just gives an error message 'tpms needs service contact tesla' until it warms up. I dont know if this is normal as it is my first winter with the car but that has been my experience of late.