Because this is a communication code rather than a mechanical failure code, the issue usually lies in the electrical path:

In Nissan vehicles, specifically those equipped with the diesel engine (found in the Navara D40 , Pathfinder R51 , and NP300 ), the fault code U1025-00 indicates a Turbocharger Boost Communication Line failure.

During the test drive, Alex noticed that the car's engine performance had improved significantly. The stalling and rough idling issues were gone, and the "check engine" light remained off. Satisfied with the results, Alex returned to the dealership and wrote up a report detailing the repairs.

: Since the turbo vanes cannot be adjusted, the engine often suffers from little to no boost.