What temperature was it when you checked it? and was the engine running prior to you checking it?
If the car was sitting for a day or so and you check the pressure static (compressor not on, engine not running) It should be roughly 10psi higher than what the air temperature was when you checked it (This method only works in the summer, mid 70's to 100 degree heat). If the engine was running prior to you checking it, it's going to be hot and read a higher psi.
Are you getting any codes referring to the A/C system?
If the car was sitting for a day or so and you check the pressure static (compressor not on, engine not running) It should be roughly 10psi higher than what the air temperature was when you checked it (This method only works in the summer, mid 70's to 100 degree heat). If the engine was running prior to you checking it, it's going to be hot and read a higher psi.
Are you getting any codes referring to the A/C system?