What's the matter with BYD Song max mixed version idling at 1000?

The reason may be the logic error of ECU, which leads to the increase of the opening of idle throttle body; The battery voltage is insufficient, and ECU increases idle charging.

If the idle speed of the engine is 1000 rpm when the car is cold, when the engine temperature rises to a certain value, the idle speed will decrease, so it is normal.

Idle speed can be adjusted by adjusting throttle opening and idling oil supply. Generally speaking, the minimum idle speed is the best when the engine does not shake in the idle speed range and the acceleration performance is good. When adjusting the idle speed, the speed should not suddenly increase or decrease, otherwise it will cause early wear and tear to the engine.