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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Diagnostic Codes (1 Of 3) >> CAN COMMUNICATION SYSTEM (except Gasoline Model) >> DTC U01BD-87: Lost Communication with DC/DC Converter Control Module "C" Missing Message; DTC U0291-00: Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message; DTC U0291-87: Lost Communication with Gear Shift Control Module "B" Missing Message; DTC U029A-87: Lost Communication with Hybrid/EV Battery Sensor Module Missing Message; DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (ch2) Missing Message [10/2022 - 08/2023] >> Description
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DTC U01BD-87: Lost Communication with DC/DC Converter Control Module "C" Missing Message; DTC U0291-00: Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message; DTC U0291-87: Lost Communication with Gear Shift Control Module "B" Missing Message; DTC U029A-87: Lost Communication with Hybrid/EV Battery Sensor Module Missing Message; DTC U1176-87: Lost Communication with Gear Shift Control Module "A" (ch2) Missing Message [10/2022 - 08/2023]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U01BD-87 Lost Communication with DC/DC Converter Control Module "C" Missing Message Communication stops between the hybrid vehicle control ECU and the EV converter assembly.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • EV converter assembly
  • No. 19 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U0291-00 Lost Communication with Gear Shift Control Module "B" (System 2) Missing Message Communication stops between the transmission floor shift assembly and the shift control actuator assembly.
  • CAN main/branch bus lines or connector
  • Transmission floor shift assembly
  • Shift control actuator assembly
  • No. 19 CAN junction connector
 DTC Output from
  • Transmission floor shift assembly
U0291-87 Lost Communication with Gear Shift Control Module "B" Missing Message Communication stops between the hybrid vehicle control ECU and the shift control actuator assembly.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • Shift control actuator assembly
  • No. 19 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U029A-87 Lost Communication with Hybrid/EV Battery Sensor Module Missing Message Communication stops between the hybrid vehicle control ECU and the battery voltage sensor.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • Battery voltage sensor
  • No. 19 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
U1176-87 Lost Communication with Gear Shift Control Module "A" (ch2) Missing Message Communication stops between the hybrid vehicle control ECU and the transmission floor shift assembly.
  • CAN main/branch bus lines or connector
  • Hybrid vehicle control ECU
  • Transmission floor shift assembly
  • No. 19 CAN junction connector
 DTC Output from
  • Hybrid vehicle control ECU
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