Turn ignition on, warning comes up on dash for " Parking assistance unavailable"

No beep when putting in reverse,
Reverse light works

1 fault code U1724 Parking sensor node (nsp) PRESENT

On the brown plug on control module, If i test CAN wires, I`m getting 4.5v on white wire and 0.8 volts on Blue wire, Are these prone to BCM failing

Thanks all