Join Date: Jul 2018
Location: Bainbridge Island, WA
To paraphrase Shakespeare: "This learned constable [i.e., the TMPS system] is too cunning to be understood."
I have the tire pressures up on my display all the time and keep a close eye on them to maybe spot it if one starts to lose air, but I use a good gauge to actually air up my tires.
What seems odd to me about the TPMS is that the pressure that is displayed is supposed to be adjusted to what the pressure would be if the tire was at 68F, which would make sense; but the displayed pressure changes as the tires warm up. I guess I don't understand the adjustment algorithm. The amount of air in the tire doesn't change, it just expands (or tries to expand) as it warms up so the pressure increases; but if the TMPS were adjusting the PSI to what it would be if the tires were at 68F the displayed pressure shouldn't change. Maybe the TPMS doesn't report actual tire temperature, it uses the ambient temperature which is sensed someplace else and the tires are actually warmer than ambient since they are on the pavement and flexing.
'18 GTL ebony metallic
added: Altrider engine bars, Ilium rear bars, Clearwater Darla and Billie brake lights