The sensors, if I remember correctly, have a +-4 or 5% accuracy. On 105 psi that could be 6 psi
The sensors are only used to alert you of a slow/fast leak, and high temps which could mean inner tire separation.
What tireminder told me a long time ago was to use a quality gauge to set temp. Then sensors for the warning
In your case if you're worried check the pressure with another guage.
Also very important to not tighten the sensor to much. As you tighten the sensor stop 1/4-1/2 turn after you hear the air stop. If you tighten to tight you wont get a reading from the sensor. well you'll get one but it wont change, raise, as it should when you start driving
Jerry
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