Hi Scotty, 2015 Pilot, 2012 CR-V.
I'm having more trouble than usual keeping the correct tire pressure this winter. I can insure the tires are at 32 PSI cold, and within 2 days the TPMS light will come on at 28 PSI. Both cars have a 2 piece TPMS and I've checked they are tight. I've tightened the valve core, and even have the caps with the rubber seal in them. I know nitrogen is preferred, but just haven't made the move to that yet. Any assistance would be appreciated.
Here's an update and an answer. "cold" in my area is 32'ish or below. all 4 tires were losing about 2 PSI in a 24 hour period.
The tires are close to end of their life at about 4/32nds, but not ready to be replaced just yet.
Now that it's warmer (55 or above), the tires aren't losing pressure hardly at all.
I guess a switch to nitrogen and a tpms seal kit are in order before next winter. I'll also be putting new tires on sometime this summer.
If they are losing pressure, I would check for punctures or signs of any dry rot on the tires. 4psi is quite a bit to lose over such a short time.
Keep in mind that you can lose a few pounds of pressure just from temperature drop.
However, if you're losing air continuously then you have a leak and you need to get your tire patched. Spray some soapy water on the tire tread to locate the hole if you want to plug it first.
https://www.youtube.com/watch?v=4RDX2jUfiCc
nitrogen won't make a difference
Hy!
When my tires were slowly loosing pressure, they were usually punctured. Check them for nails and similar objects.
Good luck!
Since you did not define what’s "WINTER" in your area: … To be certain you have a problem, do a following: … pump up the tires to a desirable pressure first thing a.m. when tires are cold, … than check them again, next a.m. - under same conditions and see if there is a discernible drop. If not, … your tires are fine.
Anyway, … with cold weather there is quite a fluctuation in tire pressure due to the temperature changes of tires. Simple physics, … and TPMS controller can be fooled.
Also, if it is cold like, for example, in my end of woods (currently -30C and beautiful, cloudless, sunshine!), your dashboard - potentially - can light up without any faults logged. My two ‘10 Hondas do just that. TPMS light stays on, air bag light stays on, TPMS controller light stays on, … and these stay on for a quite a long while until tires and all other stuff warms up. If, however, outside temperature is warmer than, say, … -20C, all is ducky, no dash lights, … dash lights work as design to work. So, make sure it’s not just that, first. FWIW.
F.S.
