Why does the car not move when shifted to D gear?

[DeArthur]

Check if the transmission fluid level is too low, whether the main oil pressure and gear oil pressure are normal, and then check if the gear switch signal is normal, if the wiring from the transmission computer to the shift solenoid valve is in good condition, and if the gear solenoid valve is functioning properly. If none of these are issues, it indicates a problem with the internal control system of the transmission, requiring disassembly of the transmission to inspect the internal components. Below is some related information: Automatic transmission: As the name suggests, it does not require the driver to manually shift gears; the vehicle automatically selects the appropriate gear based on driving speed and traffic conditions. Generally, automatic transmission cars have six gear positions, from top to bottom: P, R, N, D, S, L. Driving needs: Driving an automatic transmission car only requires the use of the parking gear P, reverse gear R, neutral gear N, and drive gear D to fully meet the needs of general driving. However, in some special driving environments, other functional gears may be needed. Therefore, if the correct control method is chosen, an automatic transmission car can perform better than a manual transmission.