Network, generic

U0163 Lost Communication With Navigation Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0163 is logged when the navigation control module, the computer that works out position and route, stops communicating. In many cars this function is built into the head unit, in others it is a separate box behind the trim. Listeners such as the instrument cluster, a camera unit or the telematics module show turn arrows or a map on their own screens and therefore watch its messages; GM's general rule for U0100-U02FF codes applies: supervised message missing at 9-16 V. No manufacturer documents U0163 in an openly accessible source. U0162 refers to the navigation display, U016A to a separate GPS receiver, U0464 to implausible navigation data. Navigation, map and route guidance fail; no MIL.

Likely causes

Navigation unit fuse, supply or ground faulty
Connector at the head unit or navigation box loose or corroded
Navigation software hang or failed map/software update
Navigation control module internally faulty

Symptoms

  • Navigation and route guidance unavailable
  • Turn arrows missing in the cluster or head-up display
  • Code stored in the cluster or other display modules

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€20–1,500
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

navigation control modulecan bus wiring

Related codes

U0162U0464U016AU0198

References: law.cornell.edu, en.wikipedia.org, saabwisonline.com.