What causes a 2000 Nissan Xterra automatic not to go in reverse sometimes?

A 2000 Nissan Xterra may not go into reverse due to several potential issues, including low Transmission Fluid levels, which can affect hydraulic pressure, or a malfunctioning transmission solenoid. Worn or damaged transmission components, such as bands or clutches, can also prevent engagement in reverse. Additionally, problems with the shift linkage or a faulty transmission control module may contribute to the issue. Regular maintenance and diagnostics are recommended to identify and resolve the underlying cause.