Specifically indicates "Missing Calibration" or that the system is "Not Configured" .
In Nissan's diagnostic hierarchy, this code is typically generated by the . Nissan B20db-54
Corrosion or damage to the harness connecting the height sensor to the Power Control System . Nissan B20db-54
A physical failure of the height sensor (often located on the rear axle) can prevent the system from completing its self-check. Nissan B20db-54
The code is rarely a sign of a mechanical engine failure and is almost always electrical or software-related: