The P2110 OBDII fault code P2110 indicates to the Powertrain Control Module (PCM) that a malfunction has been detected in the vehicle. It limits the work of the Throttle Actuator Control (TAC) system.
This condition is known as activating the vehicle’s fail-safe mode or limp mode. Activating this mode prevents major engine problems by preventing the engine from accelerating until the malfunction is corrected.
The PCM sets this code to force the TAC system to limit the engine RPM. Although this code may specifically indicate a TAC system malfunction, it may be triggered by other problems.