


Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off. Forced idle mode-The ECM will perform the following actions:.Throttle default mode-The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.Limited throttle mode-The ECM will continue to use the accelerator pedal for throttle control however, the maximum throttle opening is limited.

Acceleration limiting-The ECM will continue to use the accelerator pedal for throttle control however, the vehicle acceleration is limited.Reduced engine power may cause one or more of the following conditions: When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. If one of this position sensors is bad it will throw the PCM into a ĭTC P2120: Accelerator Pedal Position (APP) Sensor 1 CircuitĭTC P2122: Accelerator Pedal Position (APP) Sensor 1 Circuit Low VoltageĭTC P2123: Accelerator Pedal Position (APP) Sensor 1 Circuit High VoltageĭTC P2125: Accelerator Pedal Position (APP) Sensor 2 CircuitĭTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low VoltageĭTC P2128: Accelerator Pedal Position (APP) Sensor 2 Circuit High VoltageĭTC P2138: Accelerator Pedal Position (APP) Sensor 1-2 CorrelationĭTC P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position PerformanceĭTC P2101: Throttle Actuator Position PerformanceĭTC P2119: Throttle Closed Position PerformanceĭTC P2176: Minimum Throttle Position Not Learned Some time cheap code readers get them wrong. How did you read this code an where did you read it's definition at ? This is not a code for your vehicle. The PCM uses these sensor to know how much to open the throttle plate ,allowing more air into the engine. Has four position sensors, two are located in the gas pedal ,an two in the throttle body. No messaage of reduced engine power ? Your vehicle has electronic throttle control.
