height sensor

Just done my yearly check , the vehicle is level and correct the front pressure is 7 rear 6.5 so all good . However the height sensor readings are -1.2 and +1.1 respectively , how do I get to zero

Hi Guys, I am having 2005 LX470 and the car stuck in L only on the rear side only, the front side works fine. There are no codes and when I tried to read the rear height sensor the reading is strange. Even with the vehicle sitting at the lowest position the sensor reads 55 mm (2.1"). I opened...