LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Electronic A/T Shift Lever System (Aga0F) - Diagnostic Codes (1 Of 5) >> Electronic Shift Lever System >> DTC P085D-94: Gear Shift Control Module "A" Unexpected Operation [12/2017 - 09/2018] >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P085D-94: Gear Shift Control Module "A" Unexpected Operation [12/2017 - 09/2018]: Description

The shift control ECU monitors its internal operation. When it detects an internal malfunction, the DTC is stored in the ECM.

The cause of this malfunction may be one of the following:

Shift control ECU internal malfunction 

Vehicle speed sensor circuit malfunction 

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P085D-94 Gear Shift Control Module "A" Unexpected Operation ECU internal malfunction (system monitoring malfunction) continuously occurs for 10 seconds or more
(1 trip detection logic)
Shift control ECU Comes on
  • Master Warning Light
    • Comes on
  • Multi-information Display Error Message
    • Displayed