U0171low severityNetwork
Lost Communication with Lane Departure Module
on 2013 Subaru Legacy 3.6L H6 · AWD
What this code 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
Repair notes
Check fuses. System often needs recalibration after windshield replacement.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus