DTC P1212: TCS Communication Line: Description
WARNING: This page is about a different car, the 2003 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
This CAN communication line is used to control the smooth engine operation during the TCS operation. Pulse signals are exchanged between ECM and VDC/TCS/ABS control unit. Be sure to erase the malfunction information such as DTC not only in VDC/TCS/ABS control unit but also ECM after the TCS related repair.