P0713 Nissan Code - Transmission Fluid Temperature Sensor High Input 

Faulty Transmission Fluid Temperature Sensor
Transmission Fluid Temperature Sensor harness is open or shorted
Transmission Fluid Temperature Sensor circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Transmission issues
Faulty transmission fluid temperature sensor
Dirty transmission fluid and/or dirty transmission filter
Low transmission fluid levels
A transmission fluid leak