U015E code meaning
Lost Communication With Automated Driving System Interface Module A
What U015E means
U015E concerns interface module A, the link that passes commands from an automated driving computer to the base vehicle's brakes, steering and powertrain and reports their state back. Such interfaces belong to the act layer of the sense-think-act chain that Bosch uses to describe automated driving. When its messages stop, the automation computer can no longer command the actuators, so it has to hand control back to the driver or reach a safe stop. No manufacturer documents U015E publicly, and SAE J3016 defines only the automation levels, not the hardware. U015F is interface module B, U015C and U015D are the control modules, U045F flags implausible data from A.
U015E at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U015E
- Automated driving mode cannot be activated
- Takeover request or controlled stop during automated driving
- Driver assistance warning in the cluster
Common causes of U015E
- Most likelyInterface module A without power or ground
- PossibleBus or Ethernet connection to the interface damaged or strained
- PossibleInterface and automation computer on mismatched software
- Less likelyInterface module A internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ads interface module aCAN bus
What each part of U015E means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5E | The exact fault in that area. |
What to do next
- Note U015E 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 U015E
What does U015E mean?
U015E means "Lost Communication With Automated Driving System Interface Module A". U015E concerns interface module A, the link that passes commands from an automated driving computer to the base vehicle's brakes, steering and powertrain and reports their state back. It is a generic code, so it means the same on every make.
Is it safe to drive with U015E?
Drive gently and only to a workshop. With U015E the car can go into limp mode (reduced power) to protect itself.
Will U015E fail an emissions test?
U015E 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 U015E to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will U015E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.