Cirious

The tyre pressure monitor in the trip computer was displaying uneven results between the rear left and right tyres. I went to check their tyre pressure at the local petrol station. I made sure I had cold tyres first. After, I reset the readings it displayed uneven results again (up to 15kPa off). I tried to reset again, and then I drove for a couple of minutes to see whether they would balance out once warmed up; nothing changed. Is this normal?



Tyre pressure - Cold tyres.