Lost Communication with Image Processing Module C
The U023C code indicates that the primary engine or powertrain control module (ECM/PCM) has lost communication with the Image Processing Module 'C'. This module is part of the Advanced Driver Assistance Systems (ADAS), typically associated with peripheral vision cameras, surround-view systems, or specific vehicle positioning cameras. The 'C' designation refers to a particular instance or position of the module in multiplexed network architectures that use multiple image processing modules. Communication usually occurs over data buses such as CAN (Controller Area Network) or automotive Ethernet.
1. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.
2. Most Common Causes
- Faulty Image Processing Module 'C' (internal damage, hardware failure)
- Open or short circuit in the CAN bus or Ethernet wiring to the module (open circuit, short to ground or voltage)
- Corroded, bent, or moisture-damaged connector or terminals at the module
- Power supply issue to the module (blown fuse, defective relay, voltage drop)
- Faulty master network control module or gateway that mediates communication
- Electromagnetic interference affecting data signal integrity
- Corrupted module software or need for update/reprogramming
3. Symptoms You Will Notice
- Malfunction indicator lamp (MIL) or check engine light illuminated
- Inoperative or erratic ADAS features (e.g., surround-view camera, lane departure warning, parking assist)
- Blank or frozen display for camera-based systems
4. Step-by-Step Diagnosis
Scan the vehicle for all stored codes and freeze frame data to confirm U023C and related codes.
Visually inspect the Image Processing Module 'C' connector and wiring for damage, corrosion, or loose connections.
Check the module's power supply and ground circuits using a multimeter; verify fuse integrity and relay operation.
Test CAN bus or Ethernet communication lines for continuity, shorts, and proper termination resistance.
If wiring and power are OK, attempt to communicate with the module using a scan tool; if no response, suspect a faulty module.
Check for technical service bulletins (TSBs) related to module software updates or known issues.
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle is generally safe to drive, but ADAS features such as surround-view cameras or parking assist may be inoperative. Have the issue diagnosed and repaired promptly to restore full functionality.
How much does it cost to fix?▼
Diagnosis typically costs $100-$200. Repair costs vary: wiring repairs $150-$400, module replacement $500-$1,200 (including programming), and software updates $100-$300.