What is the problem that the number of Liana units has been 1500 rpm?

The idle control valve is stuck or damaged, or the throttle body has too much carbon deposit.

1, the phenomenon of high idle speed of cold cars is normal. Generally, the high idle speed will last for tens of seconds, and then it will return to the normal idle speed value.

If the high idle speed lasts for a long time, it may be caused by the stuck or damaged idle speed control valve or excessive carbon deposition in the throttle body. Generally, it can be solved by cleaning up the carbon deposits in these parts.

2. If the weather is very cold, the idle speed of the car will be below 1 thousand rpm after starting, about 900 rpm, in order to protect the engine.

If the vehicle is started in the weather above 15 degrees, the idle speed of the vehicle will be around 1200 rpm after starting, so as to quickly preheat the oil and lubricate the parts.