Network, generic

U015D Lost Communication With Automated Driving System Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

U015D names automated driving system control module B. Where the driving assistance computer is split into two halves, each half and the navigation and motion module watch the other over Ethernet. Stellantis case S2508000095 for the 2026 Jeep Wagoneer lists U015D-00 in the CADM and in the GNMM, together with Ethernet link and time-sync faults. Replaced modules showed no defect; the cause was harness routing that pulled on the Ethernet plugs and loosened pins. The fix is to inspect and replace the harness, which must not be spliced, and to correct the position of clip C121. The driver sees blind-spot warnings, mirror lamps staying lit and disabled ADAS. U015C is module A, U045E implausible data from B.

Likely causes

Ethernet harness too taut, pins pushed out or fretted (Stellantis S2508000095)
Harness clip in wrong position, connectors under strain
ADS control module B without power or ground
ADS control module B internally faulty

Symptoms

  • Blindspot Alert Unavailable message
  • Blind-spot lamps in the mirrors stay lit
  • Driver assistance features disabled intermittently

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€80–1,500
Time0.5–3 h

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

Parts involved

ads module bcan bus

Related codes

U015CU045EU015EU015F

References: static.nhtsa.gov, law.cornell.edu, en.wikipedia.org.