DTC P1889-14: Oil Pressure Pump Performance - Circuit Short To Ground Or Open: Action

WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.

Using the manufacturer approved diagnostic system check and install latest relevant level of software to the rear differential control module
Carry out visual check of the cable and connector between oil pump and the rear differential control module
If no circuit faults exist clear the DTCs and retest. If the fault persists install a new pump as required. For additional information, refer to: Active On-Demand Coupling Oil Pump