Alex applied the software update to the ECM, but the code U1025-00 persisted. He then decided to replace the FPCM with a new one, as it was likely faulty. After installing the new FPCM, Alex cleared the trouble code and performed a test drive to verify that the problem was resolved.
Connect your scanner and retrieve all stored codes. Note other U-codes: nissan u1025-00
: The vehicle may enter "limp mode," resulting in poor acceleration and a lack of boost. Intermittent Performance Alex applied the software update to the ECM,
: The internal electronics of the electronic actuator often fail. Wiring/Connector Issues Connect your scanner and retrieve all stored codes
: Before replacing parts, ensure your battery is healthy and holding a charge above 12.6V.
The CAN Bus wires are typically twisted pairs running under the vehicle or near the firewall. Exposure to road salt, water intrusion, or rodents chewing on wires can sever the connection between modules.
: Incorrect voltage levels on the CAN High or CAN Low lines (should typically be around 2.5V each). Recommended Steps Inspect the Plug