What it means
A control module has stopped receiving expected messages from the right-side side obstacle detection control module. The code identifies the communication loss; related obstacle-detection functions may be unavailable.
How it works
The right-side obstacle detection control module processes or reports detections for the vehicle's right side. U0233 sets when another module stops receiving its expected messages; it specifically identifies loss of communication with the right-side module, not a fault in the left-side unit.
Common causes
Most likely first.
- Loss of power or ground to the module
- Open, shorted, or damaged network wiring or connector
- Failed module
Symptoms
- Right-side obstacle-detection functions may be unavailable
- A communication fault or related warning may appear depending on the vehicle
How to diagnose it
- Scan all modules for communication codes and freeze-frame details, comparing the right-side fault with any left-side obstacle-detection codes.
- Check the display and warnings for right-side detection status, then confirm whether the corresponding feature is unavailable.
- Inspect the right-side module's connector, mounting area, and harness for impact damage, corrosion, water entry, or loose connections.
- Check the right-side module's power and ground against the manufacturer's specification.
- Test its network wiring and connectors for opens, shorts, or poor contact using the wiring diagram and manufacturer's procedure.
- If its supplies and network wiring are sound, verify communication with the right-side module using a capable scan tool before replacement.
Common fixes
- Reconnect or clean a loose or corroded right-side module connector.
- Repair damaged wiring or network connections at the right-side unit.
- Restore the module's power or ground supply.
- Replace the right-side obstacle detection module if its circuits test correctly but it remains offline.
Can I keep driving?
Driving may be possible, but assume right-side obstacle detection or related assistance is unavailable and check the right side directly when maneuvering. Do not rely on a warning or alert from that side until communication is restored.
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.