2021 Acura TLX BaseFACTORY OEM SERVICE PROCEDURE

Automatic Lighting System

Automatic Lighting System

DTC Description
B1575 Auto light sensor error
U1280 B-CAN communication bus line error (BUS-OFF)
U1281 Auto light control unit lost communication with MICU (body control module)
U128D Auto light control unit lost communication with gauge control module
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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