Why is my 2004 Nissan Murano rpm hand going so high at 20 mph?

If your 2004 Nissan Murano's RPM gauge is rising unusually high at 20 mph, it could indicate a transmission issue, such as slipping or not shifting into the appropriate gear. Another possibility is a malfunctioning throttle position sensor or a vacuum leak affecting engine performance. It's also worth checking the Transmission Fluid level and condition, as low or dirty fluid can cause erratic behavior. If the problem persists, it's best to have a professional diagnose it to avoid further damage.