What it means
A receiving module detected implausible data from the navigation display module. Map view, route or POI data fails plausibility checks and is rejected.
How it works
The receiving module checks map-view, route, or point-of-interest messages from the navigation display module. U0463 sets when that display data fails plausibility checks and is rejected, which can leave the map or related display information unavailable or incorrect.
Common causes
Most likely first.
- Module internal fault or sensor input drift
- Software version mismatch after replacement
- Gateway module routing CAN messages incorrectly
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
How to diagnose it
- Scan all modules and record freeze-frame data to identify which module set U0463 and whether navigation-display or communication faults were logged.
- Check whether the map view, route, or point-of-interest information is missing or inconsistent, and review live data from the navigation display module for invalid values.
- Inspect the display module's accessible connectors and wiring for loose terminals, damage, corrosion, or signs of water intrusion.
- Check whether the problem followed a display module replacement or software update, and verify the module's configuration and compatibility.
- If invalid display messages persist, check CAN communication and gateway routing, then test the navigation display module using the manufacturer's diagnostic procedure.
Common fixes
- Repair a loose or damaged navigation display module connector or wiring.
- Correct a display module configuration or software mismatch after replacement or an update.
- Repair a CAN or gateway fault affecting map, route, or point-of-interest messages.
- Repair a faulty display connection or input if testing identifies one.
- Replace the navigation display module if its internal fault is confirmed.
Can I keep driving?
This code generally affects navigation display information rather than driving controls. Do not rely on a route or map that appears inconsistent; use another navigation method until the display data is reliable.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.