Why wont automatic transmission change gears in a 1995 Nissan 200sx?

If the automatic transmission in a 1995 Nissan 200SX won't change gears, it could be due to several issues. Common causes include low Transmission Fluid levels, a faulty transmission control module, or a malfunctioning throttle position sensor. Additionally, issues with the transmission itself, such as worn components or a malfunctioning solenoid, could prevent proper gear shifting. It’s advisable to check the fluid level first and then consult a professional mechanic for further diagnosis.