DTC Description: Notes
WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
The turbocharger speed sensor is a hall effect type sensor. The Engine Control Module (ECM) provides a 5V supply to the position sensor and a return circuit. As the blades of the turbocharger spin past the speed sensor, a signal is generated on the position sensor signal circuit. The ECM interprets this signal and converts it to a turbo speed.