Hmmm. Not following here I’m afraid. I AM at altitude, being in Denver, however.
I can check the car reading again. Car doesn’t report from a standstill, so I have to remember before I drive too far.
Pretty sure standard pressure here is substantially lower than sea level. I know that as a rough rule of thumb one figures 15% less oxygen at 5000 feet above sea level. About 3 % per 1000 feet that is.
It follows that overall pressure would also be lower.
The Leaf is our first car with internal active pressure sensors. All of our other cars monitor indirectly with the ABS wheel speed sensors. Our camper uses external pressure sensors. Both types work well.
Empty-nesters - NW Denver-Boulder Area
2019 Leaf SL Plus
2015 Audi Q5 TDI
2007 BMW Z4 3.0Si
2012 VW GTI