DTC P0506 Idle Air Control System-Rpm Lower Than Expected: General Description

The ETS(Electronic Throttle System) controls the throttle valve to maintain idle speed according to various engine loads and conditions. The ETS is the throttle body whose throttle angle is controlled by control module. It consists of ETS unit, ETS-motor, Accelerator Position Sensor(APS), Throttle Position Sensor(TPS) and Limp home valve.