U02B2 code meaning
Lost Communication With Comfort and Convenience Display B
What U02B2 means
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.
U02B2 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U02B2
- Rear comfort display blank or frozen
- Rear climate or seat functions only adjustable from the front, or not at all
Common causes of U02B2
- Most likelyHarness to the rear display pinched or unplugged in the console or seat area
- PossibleRear display module failed
- PossibleFuse or ground of the rear display interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Comfort display bVehicle bus wiring
What each part of U02B2 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| B2 | The exact fault in that area. |
What to do next
- Note U02B2 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U02B2
What does U02B2 mean?
U02B2 means "Lost Communication With Comfort and Convenience Display B". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with U02B2?
U02B2 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U02B2 fail an emissions test?
U02B2 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U02B2 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. This is a job for a workshop.
Will U02B2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.