Disconnect/bypass air line supply to front right strut......either after valve block or at Front strut air nipple.. ....pump air to strut at say 20 psi....check pressure does it deflate/hiss?
you can then rule out/investigate - air lines and bladder.
I'm not fuss with voltages on sensors.....I could never get the readings to be same for fronts and rears..... but make sure actual ride height from fender to rim flange....are close to or less than 5mms.....IMO.
Some ideas....
