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.
While a generic code scanner might just say "Network Code," the root cause usually boils down to one of three things in Nissans: nissan u1025-00
| Severity | Medium to High | |----------|----------------| | Drivability impact | Yes – limp mode | | Risk of damage | Low if driven briefly; prolonged driving may overheat transmission due to improper line pressure | | Estimated repair cost | $300–$800 (TCM replacement + reprogramming); $150–$300 if wiring repair | In Nissan vehicles, specifically those equipped with the
Acts as a placeholder indicating no further sub-type details or specific circuit sub-faults are available; it is a total, generalized failure of the communication line. ⚠️ : The vehicle will abruptly limit throttle
The MIL (Malfunction Indicator Lamp) will typically illuminate, though it may occasionally be intermittent.
⚠️ : The vehicle will abruptly limit throttle input and maximum RPMs to protect the engine from over-boosting or structural damage.