U0163low severityNetwork
Lost Communication with Navigation Module
on 2004 Audi S4 4.2L 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.
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Other Network codes on this vehicle
00003
Control Module - Defective
01304
Radio - No Communication
01312
Powertrain Data Bus - Defective
01314
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01315
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01316
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01317
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01318
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01321
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U0001
High Speed CAN Communication Bus