However, it should be noted that most often this malfunction is caused by a failure of the throttle position sensor installed in the throttle assembly cover..
... contamination of the damper itself or the infiltration of foreign air through loose hose connections connected to the intake pipe. If cleaning the throttle body or tightening the hose clamps fails to restore idling, contact a specialist to replace the throttle assembly cover or replace the throttle assembly (cm. «Removal and installation of the throttle assembly»).
In addition, it must be taken into account that «swimming» idle speed of an engine equipped with a variable valve timing system, and stopping such an engine when the gear is engaged in neutral and the accelerator pedal is released, may be caused by a malfunction of the solenoid valves or the engine control unit.
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