So, new problem: my tire gauges don't match the readings in my cars, either the Tesla or the Chevy. I am perplexed. I thought I had a bad tire gauge that was reading too high, but I'm experiencing the same problem with both cars and both tire gauges. The car says one pressure, the gauges say another - several PSI higher. I've got two different gauges and they give the same readings. In the Tesla I'm looking at 41 as read by the car but about 44 as read by the gauges. In my Chevy Spark the car says 32 but the gauges say a hair under 35. What's going on? Is there some kind of adjustment or reset that needs to be done on the cars when the weather turns cold?