If everything looks clean, you likely need a professional scan tool (like a high-end Autel or Snap-on) to perform a “CAN bus integrity test.”
In modern Nissans, the turbocharger uses an electronic actuator to control boost levels. The ECM sends signals to this actuator to tell it how much boost the engine needs. Code U1025-00 triggers when that communication line is broken or "noisy." nissan u1025-00
When the code U1025-00 appears, it means one of these modules has stopped talking. It has effectively "hung up the phone" or been disconnected from the network line. If everything looks clean, you likely need a
Faulty turbocharger actuator (internal electronics failure). If everything looks clean
Attempt to access the ABS module with your scan tool.