hi I've recently purchased my first range rover sport and heres my first problem
the aircon wasn't getting cold so i had the car regasssed at halfords and its still not working,
I've plugged the car into a diagnostics computer and these are the fault codes which came up

b1a62- pressure sensor.i can clear this code but after a drive the code comes back

b1b78- aircon system pressure fault signal above allowable range.the computer won't clear this code

any help appreciated as i really want the aircon working
thanks