That tiny difference will not affect the performance of your ABS system. Why don't you swop the inputs from the two rears and see if the error moves as well?
Or maybe easier still, disconnect the one where there is supposed to be a fault and see...
CL was working one minute then not. It’s getting 12v. Nancom says no signal received off fob but I know it’s not this as I have two fobs and neither registering. Central Locking is working off the actuator. My question is this. Is it definitely...