What is the reason for BYD f0 idling after turning on the air conditioner?

It's normal for you, because F0 itself has a small displacement and the engine power is insufficient, so it will shake when using air conditioner for refrigeration.

However, if the jitter is severe, I suggest you go to the repair shop to clean the throttle, and then check the air conditioning signal line on the computer to see if there is something wrong with the engine.

If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.