Hello! I got same fault in right rear abs and my code was C101D01 So i find the fault and it took at least 5 hours, but i found it!! It was in wires, behind rear light in the frame. I needed to cut wires in abs sensor and pull the wires out of the rear light wires hole. They looked really good conditions, but when i take off the tapes i found factory couplings and they was so rusted. I think they made those couplings because it was little bit longer than normal t6 it was bus model and like half meter longer... When this happened i got only something 3,5v in abs sensor and it shoult be 11-12v. What i saw there was same shit wires in left side too, so if you got electric problem in left abs sensors, check left side wires. Thank you.