Network, generic

U02B2 Lost Communication With Comfort and Convenience Display B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Where a vehicle carries two comfort screens, display B is normally the second one, the rear panel from which back-seat passengers set climate and seats. U02B2 means that unit has dropped off the bus while display A may keep working. No manufacturer documents U02B2 or says which screen carries the letter B. The Jeep Grand Wagoneer shows the layout: a rear display (CCDMR, two part numbers) next to the front one, with a lockout of the rear unit selectable from the front. Stellantis uses that lockout to find which screen issues phantom fan changes and replaces the culprit with a newer firmware part (S228A000013, Rev. A, 2023). Rear wiring runs through the console and seat area, where it can be pinched. Rear occupants lose their own climate and seat controls.

Likely causes

Harness to the rear display pinched or unplugged in the console or seat area
Rear display module failed
Fuse or ground of the rear display interrupted

Symptoms

  • Rear comfort display blank or frozen
  • Rear climate or seat functions only adjustable from the front, or not at all

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,600
Time0.3–2 h

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

Parts involved

comfort display bvehicle bus wiring

Related codes

U02B1U05B3

References: static.nhtsa.gov, static.nhtsa.gov.