U0171
NetworkModule Communicationlow severityLost Communication with Lane Departure Module
What U0171 Means
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
- Check lane departure module fuse
- Test power and ground
- Check CAN wiring
- Inspect windshield camera
- Check for calibration need after windshield replacement
Where to start: Check fuses. System often needs recalibration after windshield replacement.
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