U015D code meaning
Lost Communication With Automated Driving System Control Module B
What U015D means
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.
U015D at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U015D
- Blindspot Alert Unavailable message
- Blind-spot lamps in the mirrors stay lit
- Driver assistance features disabled intermittently
Common causes of U015D
- Most likelyEthernet harness too taut, pins pushed out or fretted (Stellantis S2508000095)
- PossibleHarness clip in wrong position, connectors under strain
- Less likelyADS control module B without power or ground
- Less likelyADS control module B internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ads module bCAN bus
What each part of U015D means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5D | The exact fault in that area. |
What to do next
- Note U015D 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 U015D
What does U015D mean?
U015D means "Lost Communication With Automated Driving System Control Module B". U015D names automated driving system control module B. It is a generic code, so it means the same on every make.
Is it safe to drive with U015D?
Drive gently and only to a workshop. With U015D the car can go into limp mode (reduced power) to protect itself.
Will U015D fail an emissions test?
U015D 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 U015D to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will U015D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.