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Home >> Lexus >> 2025 >> NX 350 Base >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Electronic A/T Shift Lever System - Diagnostic Codes & Circuit Tests >> Electronic Shift Lever System >> DTC U0291-00: Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message [11/2021 - ] >> Description
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DTC U0291-00: Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message [11/2021 - ]: Description

The shift control ECU receives or sends a signal to and from the shift actuator ECU via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
U0291-00 Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message When the ignition switch is ON and the battery voltage is a certain value or more, a CAN (SBW2 bus) communication malfunction with the shift actuator ECU is continuously detected
(1 trip detection logic)
  • Shift control actuator assembly (shift actuator ECU)
  • Transmission floor shift assembly (shift control ECU)
  • ECM
  • Harness and connector
Comes on Multi-information Display Error Message 
  • Displayed
Transmission B SAE: U0291