Lost Communication With Navigation Map Database Module
The U0163 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Navigation Map Database Module. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $50 - $500 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Navigation maps not loading
- Map display shows blank or outdated data
- Navigation system gives error message
- Route calculation fails
- GPS position shown but no map overlay
Probable Causes (Ranked by Likelihood)
- Corrupted map database SD card or hard drive Very High
- Failed navigation map database module High
- Outdated or incompatible map software Moderate
- Loose SD card or connection to map storage Moderate
Step-by-Step Diagnostic Procedure
-
Check if the navigation SD card is properly seated in its slot
-
Remove and reinsert the map SD card to reset the connection
-
Check for available map database updates from the manufacturer
-
Verify the navigation system powers on and communicates correctly
-
Try a known good SD card if available to rule out media failure
Frequently Asked Questions
Can I drive with code U0163?
Yes, this only affects the navigation map display. All driving and safety systems are unaffected.
What causes U0163?
Usually a corrupted or missing map SD card, or a failed map database storage device. Reinserting the SD card or updating the map database often fixes the issue.
Is U0163 expensive to fix?
Often inexpensive at $50 to $150 for a new SD card or map update. Full module replacement can reach $500 but is rarely needed.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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