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Home >> Lexus >> 2014 >> IS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FSE) - Diagnostic Codes (4 Of 6) >> SFI System >> DTC P0505: Idle Control System [06/2014 - 10/2017] >> Description
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DTC P0505: Idle Control System [06/2014 - 10/2017]: Description

The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle body with motor assembly; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the electronic throttle control system. Based on the target idle speed, the ECM controls the throttle actuator to provide the proper throttle valve opening angle.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0505 Idle Control System Idle speed continues to vary greatly from target idle speed (2 trip detection logic).
  • Electronic throttle control system
  • Intake system
  • PCV hose connection
  • ECM
Comes on DTC stored