OBD-II code · Network
U0163 Lost Communication with Navigation Control Module
The Navigation Control Module has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. Navigation and route guidance stop working. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0163?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyNavigation module unpowered
- PossibleCAN wiring to navigation module broken
- Less likelyGateway 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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Navigation Control Module, Can Bus Wiring
Related codes
- U0160Lost Communication with Audible Alert Control Module
- U0161Lost Communication with Compass Module
- U0162Lost Communication with Navigation Display Module
- U0164Lost Communication with HVAC Control Module
- U0165Lost Communication with Auxiliary HVAC Control Module
- U0166Lost Communication with Auxiliary Heater Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.