DTC P2107 OBDII indicates that the PCM (Powertrain Control Module) has found a malfunction of the TAC (Throttle Actuator Control) system.
The PCM manages the Throttle Actuator Control system through one or more Throttle Position Sensors (TPS). To achieve an efficient performance of the throttle body, the throttle plate must work correctly. The throttle plate is controlled by the TAC system.