U0163low severityNetwork
Lost Communication with Navigation Module
on 2004 Land Rover Discovery 4.0L V8 · AWD
What this code means
Cannot communicate with the navigation processing module separate from the display.
Symptoms
- Navigation function unavailable
- Map calculations not processing
- Route guidance not working
Common causes
- Navigation processor failure
- CAN bus wiring
- Module power loss
- Fuse blown
- GPS antenna issue
Diagnostic steps
- Check navigation module fuse
- Test power and ground
- Check CAN wiring
- Verify GPS antenna connection
- Test module with diagnostics
Repair notes
Check fuses and GPS antenna cable. Navigation processor may need map data update.
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