Blow the throttle yourself when idling.

According to the owner's guide, there may be the following reasons for stepping on the accelerator when the car is idling:

Throttle sensor fault. The throttle sensor is used to detect the throttle opening, and it will transmit the signal to the engine computer to control the engine speed. If the accelerator sensor has faults such as short circuit, open circuit or improper installation, it will cause the engine computer to get wrong information, thus automatically adjusting the engine speed, resulting in the phenomenon of slamming on the accelerator when idling.

Idle motor stuck or lost memory. Idle motor is used to control idle speed. It will adjust the micro-opening of the throttle according to the instruction of the engine computer, so as to keep the idle speed stable. If the idle motor is stuck or the memory is lost, it will lead to inaccurate throttle opening, resulting in the phenomenon of self-explosion of throttle at idle speed.

The air inlet leaks. The air inlet is used to deliver air to the engine. If there is air leakage at the air inlet, such as damaged vacuum tube, aging sealing ring or damaged throttle pad, it will lead to insufficient air intake, affect the mixing ratio of the engine and cause self-throttling at idle speed.

The air conditioner is on. If the car turns on the air conditioner, the compression of the air conditioner will consume part of the engine power, thus affecting the engine speed. In order to maintain the stability of idle speed, the engine computer will automatically adjust the engine speed, resulting in the phenomenon of self-explosion of the throttle at idle speed. In this case, as long as you turn off the air conditioner, you can return to normal.