DTC P1211: TCS Control Unit: Description
WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
The malfunction information related to TCS is transferred through the CAN communication line from ABS actuator and electric unit (control unit) to ECM.
Be sure to erase the malfunction information such as DTC not only for ABS actuator and electric unit (control unit) but also for ECM after TCS related repair.