DTC P1121: Electric Throttle Control Performance Problem: Description

The electric throttle control actuator consists of throttle control motor, Throttle Position (TP) sensor, etc. The throttle control motor is operated by the ECM and it opens and closes the throttle valve. The TP sensor detects throttle valve position, and opening and closing speed of throttle valve and feeds voltage signals to the ECM. The ECM judges current opening angle of throttle valve from these signals and ECM controls throttle control motor to make throttle valve opening angle correct in response to driving conditions.