Tire pressure sensor

You might want to look at where you have your alerts set. My fronts are at 88 on a cool evening, 90 on a warm day when not moving and run about 104 after driving down the road for a while. Talking to the guys at the tire shop, they say that is about normal. Rears are 4 PSI higher than fronts at all times. Tire shop said to set high pressure alarm 20 PSI above max PSI on sidewall, set low pressure alert 10 PSI below cold weather pressure (78 on front, 82 on rear). Have a TireMinder system which looks at rate of change as well as actual pressure and temp.

EDIT. My sensors all read + or - 1 PSI from my digital and analog gauges which both read the same.