You’d check with vcds/scan tool via the AC module.
The nature of car AC I’m afraid often requires rectification of the immediate fault in front of you before any further comment as to serviceability of the system as a whole can be confirmed. Good practice diagnostics and experience will often...
If you’ve checked the wiring correctly and the sensor is oem, fault must be in the module. Might be worth double checking your work as this isn’t common.
What does live data show for pressure (sorry if mentioned before, I’m on mobile)?