What is the reason for the car not moving when shifting to D gear in cold conditions but functioning normally when warm?

[Harriet]

Introduction to the reasons why the car doesn't move when shifting to D gear in cold conditions but functions normally when warm: The issue is caused by faults in components such as the clutch, torque converter (torque drum), and solenoid valves. Severe wear or burning of the internal friction plates or other components within the clutch leads to poor engagement of the entire automatic transmission, resulting in a "short circuit" in power transmission. This prevents the gear from receiving driving force, causing a temporary loss of gear. Below are the related explanations: 1. After the engine starts, it generates a significant amount of power. The torque converter in the automatic transmission inputs this power into the transmission, which is then distributed to various gears through different types of clutches within the transmission, allowing the car to drive normally. 2. Severe wear or burning of the internal friction plates or other components within the clutch leads to poor engagement of the entire automatic transmission, resulting in a "short circuit" in power transmission. This prevents the gear from receiving driving force. 3. Additionally, if the internal oil temperature is too low or too high, the automatic transmission's computer cannot read and identify it, and thus cannot send commands to the gear switch and other electromechanical modules, causing the car to remain immobile.