Network, generic

U02BC Lost Communication With Localization and Mapping Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The localization and mapping module merges satellite positioning, correction data and vehicle motion signals with a detailed map, so that hands-free or automated driving knows its lane and the road ahead; Bosch offers such a GNSS-based unit for driver assistance and automation. U02BC means this module has stopped communicating. Stellantis documents it for the 2024-2026 Jeep Wagoneer and Grand Wagoneer (STAR S2508000095): U02BC-00 appears for the GNMM together with Ethernet time-sync and link-status faults toward the central ADAS module, blind spot alerts and other assistance functions shut off, and modules replaced for it proved healthy. The cause was an Ethernet harness routed too tight, straining its connectors; the fix is correct routing or a new harness, never a repaired cable. No MIL.

Likely causes

Ethernet harness routed too tight, connector strained or not latched
Bent or damaged Ethernet connector pins
Module supply missing or module internally faulty

Symptoms

  • Blind spot alert unavailable, service message in the cluster
  • Hands-free or advanced driver assistance disabled
  • Several ADAS and Ethernet codes stored at once

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–900
Time1–3 h

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

Parts involved

localization mapping modulevehicle bus wiring

Related codes

U05BDU015CU015DU0081

References: static.nhtsa.gov, bosch-mobility.com.