I have Nissan tida car when I shift lever in D...

Our dear customer, regarding the problem facing your car, which is a problem with the gearbox, the gear (D) does not respond, this is due to reasons including:
1- There is a problem of leakage in your car’s fluid, as this fluid is considered one of the main reasons for changing the speed in a smooth and easy way, so you must clean the oil periodically, and constantly go to the mechanic to follow up on the process of cleaning the oil from impurities, because this will preserve On the safety of your car's transmission.
2- The car not moving in position D or R is one of the automatic transmission malfunctions, which is the most common, and the cause of this malfunction is often a problem with the gear shift cable and it must be changed, or damage to the body of the valves or pistons responsible for the engagement.