The code indicates a voltage issue to the A/C pressure sensor. It should have a 5v reference. The code indicates it is either too high or too low.
Disconnect the pressure sensor and check the voltage to it. It should be between 4.8v and 5.2v. This will help us determine if there is a short to voltage or a short to ground.
Also, I attached information below related to this code. Take a look through it and let me know if it helps.
Here is a link you may find helpful when testing:
Let me know what you find or if you have other questions.
See pics below.
Images (Click to enlarge)
Thursday, July 8th, 2021 AT 9:29 PM