What it means
A control module has stopped receiving expected messages from side obstacle detection control module C. The code identifies the communication loss; related obstacle-detection functions may be unavailable.
How it works
Side obstacle detection control module C exchanges messages with other vehicle modules so related detection functions can operate. U024E sets when another module stops receiving the expected messages from module C; it does not prove that a particular sensor itself has failed.
Common causes
Most likely first.
- Bus wiring open or shorted
- Module without power or ground
- Module failed
Symptoms
- Related side obstacle-detection functions may be unavailable
- A warning may appear depending on the vehicle
How to diagnose it
- Scan all modules and save freeze-frame and network data, noting whether other side obstacle detection or communication codes accompany U024E.
- Check the vehicle's warnings and test the side obstacle-detection functions associated with module C only in a safe, stationary setting.
- Inspect module C's connector and accessible bus wiring for impact damage, water intrusion, corrosion, or loose connections.
- Check module C's power and ground using the manufacturer's procedure.
- Test the network circuit to module C for opens or shorts using vehicle-specific wiring information.
- If power, ground, and bus wiring pass, follow the manufacturer's communication diagnostic steps before replacing module C.
Common fixes
- Reconnect a loose connector at module C.
- Repair damaged, corroded, or water-affected network wiring and connectors.
- Repair a failed power supply or ground to module C.
- Replace module C only after its wiring and supplies are confirmed good.
Can I keep driving?
Treat the related side obstacle-detection functions as unavailable until repaired, and do not rely on them when changing lanes or manoeuvring. The vehicle may remain driveable, but use direct observation and mirrors and heed any system warnings.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.