Can the A button of an automatic transmission be kept on all the time?

[VonFernando]

The A button of an automatic transmission can be turned on or off, and specific instructions vary by model. Please refer to the vehicle manual for details. Here is some relevant information: 1. Function: The A button of an automatic transmission refers to the Auto Hold function. This technology allows the driver to avoid unnecessary vehicle sliding without the need for prolonged braking or engaging the electronic parking brake. Additionally, this function prevents the vehicle from rolling backward when starting on a slope. Traditional parking brake devices require the driver to manually release the handbrake based on experience when starting on a slope. 2. Disadvantages: If the Auto Hold function remains enabled while reversing, it means the vehicle cannot be controlled to move slowly by lifting the brake, which may lead to accidents if the throttle is not properly managed. Moreover, some early versions of the Auto Hold function had noticeable jerking during use, resulting in a poor user experience. However, the system has been significantly optimized in recent years, but the actual performance still depends on the user's experience.