[impactplayer]

I started getting a TPMS malfunction in iDrive and it won't allow me to do a reset. I double checked my tire pressure this morning (when tires were cold) and three of the four tires had dropped to approximately 35 psi (from 39/41 F/R) in the last month or two. However, one tire (rear driver) was at 45 psi. This is an increase of 4 psi from what I filled it up at a month or two ago, and 9 psi higher than the other tires. Any clue what happened? I'm a little confused