Lost Communication with Navigation Module
2016-2016 Cadillac ATS 2.5L I4
The 2016 Cadillac ATS is equipped with a 2.5L inline-4 engine. Below you'll find detailed u0163 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
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.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
U0163 on Other Vehicles
Common Questions
What does code U0163 mean on a 2016-2016 Cadillac ATS?
U0163 stands for "Lost Communication with Navigation Module". Cannot communicate with the navigation processing module separate from the display.
What are the symptoms of U0163 on a Cadillac ATS?
Common symptoms of U0163 include: Navigation function unavailable, Map calculations not processing, Route guidance not working.
What causes U0163 on a 2016-2016 Cadillac ATS?
Common causes of U0163 include: Navigation processor failure, CAN bus wiring, Module power loss, Fuse blown, GPS antenna issue.
Last updated: March 2026