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Home >> Lexus >> 2022 >> NX 350 Base >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transaxle System - Diagnostic Codes (2 Of 3) >> Automatic Transaxle System >> DTC P176A-87: Lost Communication with Fail Safe Signal (Gear Shift Control Module "A") Missing Message [11/2021 - ] >> Description
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DTC P176A-87: Lost Communication with Fail Safe Signal (Gear Shift Control Module "A") Missing Message [11/2021 - ]: Description

The shift control ECU (transmission floor shift assembly) sends the fail-safe signals to the ECM.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P176A-87 Lost Communication with Fail Safe Signal (Gear Shift Control Module "A") Missing Message Fail-safe signal (SBFS) is not transmitted from shift control ECU (transmission floor shift assembly) for 2 seconds or more (1-trip detection logic).
  • Shift control ECU (Transmission floor shift assembly)
  • Wire harness or connector
Does not come on DTC stored SAE Code:
P176A