I read in the manual that you can only get the tire pressure readings while driving at over 20mph (32kph) . Sure enough, when I was at the dealership and we were going through the functions, there weren't any readings.

Now, after I installed my grounding kit over the weekend.... I went and sat in the car today before work.... turned it on... played with the computer.... ( I don't get to drive until spring ).... and low and behold I was getting all the pressure readings except for 1 of the rear tires! .... it was at a stand still in my garage.... not even in gear.... is this due to the ground kit? I have still have to drive around and test if the other rear one is working or malfunctioning... but has anyone else noticed this?