My 2015 Nissan Pathfinder keeps shutting off and won’t reverse?
Is there a check engine light on? Have you checked the transmission fluid level? Do the car restart easily after it shuts off?
You can make sure the shifter is actually shifting the selector into the reverse gear. Physically look to make certain the manual lever on the transmission is actually shifting into the right position. Once you have made certain it is actually in the reverse position you can move on to testing pressure. You will be required to use a scan tool or an external gauge. This will let us know what is going on in the transmission. Most common failure component for this would be a faulty Line Pressure Solenoid.