Bad Tire Pressure Monitor?

[YukonCrazy]

I went to the dealer to get an oil change. At the same time, they did a tire rotation and I watched the guy walk around the vehicle touching each tire with some device which I assume he was resetting each monitor. I drive off and all is good. The next day, I have a Tire Pressure Monitor display on the dash. Does that mean one of the sensors is bad? It doesn't tell me which tire so I have to change all 4?

 

[cjweb11]

Try cycling through your DIC readouts to find which tire is just showing -- instead of a number value

 

[08grey]

He was placing the sensors in the correct position. You can also do this yourself by releasing air from each tire. Google how. I would just take it back if I were you.