The TCS stands for Traction Control System, I believe. The TCS is controlled by inputs from the wheel speed sensors. If you have a bad sensor, then a new hub may be required to repair it.
The check engine light may be a sepawrate problem. Have the codes scanned for both the Anti lock braking sytem, TCS, and the check engine light.
Sometimes it will require a separate scanner for the TCS/ABS vs. the Check Engine light.
Good luck on this diagnosis and repair.
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