Tire Pressure Sensor Accuracy

[NJBob]

have many of you compared tire pressure reading difference between an accurate high quality gauge and the dashboard reading from the sensors?? I have a 3 to 4 lb difference. Higher on tire sensor.

 

[QuickSteed]

Really? The TPMS I feel should be pretty accurate no? I havent personally checked with an accurate gauge but it worries me now.