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Home/DTC Codes/Toyota/86/2017-2020 2.0L H4/U0171
U0171

Lost Communication with Lane Departure Module

2017-2020 Toyota 86 2.0L H4

Low SeverityNetworkGeneric (SAE)

Description

Cannot communicate with the lane departure warning or lane keeping assist module.

Symptoms

  • Lane departure system disabled
  • LDW warning light
  • Lane keeping assist not available
  • Camera error message

Common Causes

  • Lane departure module failure
  • CAN bus wiring
  • Module power loss
  • Camera failure
  • Windshield calibration needed

Diagnostic Steps

  1. Check lane departure module fuse
  2. Test power and ground
  3. Check CAN wiring
  4. Inspect windshield camera
  5. Check for calibration need after windshield replacement

Repair Notes

Check fuses. System often needs recalibration after windshield replacement.

Related Codes

U0170Lost Communication with Blind Spot Detection Module

Other Network Codes

U0171 on Other Vehicles

Toyota 4Runner

2010-2024 4.0L V6

Toyota Alphard

2023-2025 2.4L I4 Turbo T24A-FTS

Toyota Alphard

2023-2025 2.5L I4 Hybrid A25A-FXS

Toyota Aqua

2011-2021 1.5L I4 Hybrid 1NZ-FXE

Toyota Aqua

2021-2025 1.5L I3 Hybrid M15A-FXE

Toyota Avalon

2005-2012 3.5L V6

Toyota Avalon

2013-2018 2.5L I4

Toyota Avalon

2013-2018 3.5L V6

Common Questions

What does code U0171 mean on a 2017-2020 Toyota 86?

U0171 stands for "Lost Communication with Lane Departure Module". Cannot communicate with the lane departure warning or lane keeping assist module.

What are the symptoms of U0171 on a Toyota 86?

Common symptoms of U0171 include: Lane departure system disabled, LDW warning light, Lane keeping assist not available, Camera error message.

What causes U0171 on a 2017-2020 Toyota 86?

Common causes of U0171 include: Lane departure module failure, CAN bus wiring, Module power loss, Camera failure, Windshield calibration needed.

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