Lost Communication With Navigation Control Module
What it means
U0163 means the vehicle has lost communication with the navigation control module — the computer behind the built-in navigation and its map display. When it goes offline you lose navigation and related display features, but nothing about how the car drives is affected. The cause is normally a wiring, connector, power/ground, software, or bus fault at the module, and it's a low-priority, comfort-only issue.
Can I keep driving? Yes — this is a navigation/infotainment fault. The car drives normally; you just lose navigation and possibly related display features until it's repaired.
Common symptoms
What you'll notice
- Navigation unavailable, or the display is blank or frozen
- Loss of nav-linked features such as maps and guidance
- Infotainment or display error messages
- Scan tool can't reach the navigation control module
Common causes
Most likely first
- Wiring or connector fault at the navigation moduleLikely
- Power or ground problem to the moduleCommon
- Failed navigation control moduleCommon
- Software fault or bus wiring issueLess often
How to diagnose & fix
Work through it in order
- Confirm the code and check for related infotainment U-codes.
- Inspect the module's connector, wiring, power, and ground.
- Try a system or software reset if the vehicle supports one.
- Verify bus communication to the module.
- Replace and program the navigation module if it's confirmed faulty.
FAQ
Quick answers
Is it safe to drive with U0163?+
Can I just clear U0163?+
Related codes
Often seen with U0163
Read & clear U0163 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.