My tire pressure sensors are off by +3-4 psi depending on which tire (Michelins) all original equipment. Any way to calibrate them? One is accurate, the three others read high.

 

Inaccurate according to what?
They are not user adjustable.

 

I checked all the tires after an oil change at the dealership. Noticed they were off the recommended pressures. Then checked all four tires with a reliable gauge and found that all were correct. So my truck sensors are not accurate. Just was hoping there was a way to calibrate the truck sensors. Apparently not.