What causes high idle speed in Chery X1?

[MaddoxFitz]

Common faults that cause high idle speed in cars include throttle valve sticking or not closing properly, idle control valve failure, coolant temperature sensor failure, intake system air leakage, and faults in the air conditioning switch or power steering pressure switch. Idle control valve failure: The normal idle speed of an electronic fuel injection engine is determined by the idle control valve. The electronic control unit calculates signals from engine speed, temperature, throttle valve switch, and air conditioning switch, then adjusts the idle control valve to open the intake bypass channel or directly increase the throttle opening to boost air intake and raise the engine's idle speed. If oil contamination or carbon deposits cause the idle control valve to stick or the throttle valve to fail to close properly, the electronic control unit cannot accurately regulate the engine's idle speed. Intake system air leakage: Normally, the intake air volume must be strictly controlled. If there is an air leak in the intake pipe, the air flow sensor cannot measure the actual intake air volume, leading to inaccurate control by the electronic control unit and resulting in unstable idle speed.