Problem code P2106 OBD2 implies that the Powertrain Control Module (PCM) found a malfunction that limits the work of the throttle actuator control system. It is a condition that is called fail-safe mode, which is activated to prevent the engine from accelerating until the malfunction is corrected.
If other codes indicate an engine safety issue or cause engine damage, the PCM sets the code P2106 to force the throttle actuator control system to limit the engine power level.