Tire sensor or computer problem

[johnm]

When I started my car today I immediately got a RF high tire pressure warning on the DIC. When I called up the number on the DIC it indicated 44psi. I checked all the tires manually and all were at 31 psi. I drove the car 70 miles and I continued to get high tire pressure warnings on all 4 tires over and over. The DIC indicated all 4 tires were at 44psi. When I parked the car I checked all the tires manually while still hot and all were at 35psi. Is there a protocol to reset the sensors? or computer? Could all the sensors go bad at the same time (unlikely I would guess)?Any insight would be appreciated. Thanks johnm