DTC P1211: TCS Control Unit Fault : Description
WARNING: This page is about a different car, the 2003 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
This CAN communication line is used to communicate during the TCS operation. Pulse signals are exchanged between ECM and ABS actuator and electric unit (control unit). Be sure to erase the malfunction information, such as DTC in ABS actuator and electric unit (control unit) and in ECM after repair.