U015FLost Communication With Automated Driving System Interface Module B
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- U015F is the companion code for automated driving system interface module B. A second interface lets a fail-operational design keep a path to the vehicle actuators when the first one drops out, which matters most above SAE level 2, where the system rather than the driver watches the road. When B goes silent, the remaining path may still work, but redundancy is gone, and most systems then refuse to engage or ask the driver to take over. No manufacturer documents U015F publicly; the setting rule matches GM's generic description: a supervised periodic message is missing while supply sits between 9 and 16 V. U015E is module A, U0460 flags implausible data from B. Manual driving stays unaffected.
- What you may notice
- Automated driving unavailable, redundancy fault message
- Request to take over steering and braking
- Code stored in the automation computer
- Likely causes
- LikelyInterface module B fuse, supply or ground faulty
- PossibleConnector or line of the redundant bus path damaged
- RareModule B not updated together with the other ADS modules
- RareInterface module B internally faulty
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.