DTC P2105: Throttle Control System - Out Of Controllable Limit: Description

If the Engine Control Module (ECM) detects a condition in the Throttle Actuator Control (TAC) system, the ECM disables the TAC motor. The Accelerator Pedal Position (APP) sensor will have no affect on the throttle position and the throttle will remain in the rest position. The RPM will vary due to limited fuel and spark changes based on APP input. If the engine speed is above 1300 RPM, the ECM will turn the fuel off for short intervals until the engine RPM is below 1300 RPM. If the ECM detects a fault in the TAC system that is beyond its controllable limits, DTC P2105 sets.