Possible Causes

Right rear height sensor - Signal amplitude above maximum
Right rear height sensor linkage not connected
Right rear height sensor or bracket loose
Right rear height sensor bracket bent
Incorrect height calibration
Right rear height sensor linkage toggled
Right rear height sensor water ingress
Wiring to right rear height sensor partial short to ground
Wiring to right rear height sensor short to other cable
Right rear height sensor electrical fault
Right rear height sensor linkage bent
Incorrect height sensor installed