What Does U023B Mean?
The secondary image processing module has lost communication with the vehicle network. This backup or secondary module may handle additional camera inputs or redundant processing for safety systems.
Common Causes
35%
Failed image processing module B
30%
Wiring harness damage or connector issues at module B
20%
CAN bus network fault affecting multiple modules
10%
Power supply or ground circuit failure to module B
5%
Module B software failure or configuration error
Diagnostic Steps
1
Step 1: Check power supply voltage and ground integrity at module B connector
2
Step 2: Inspect connector terminals and wiring for physical damage or corrosion
3
Step 3: Measure CAN High and CAN Low voltages at module B location
4
Step 4: Compare communication status with module A to determine if network-wide issue
5
Step 5: Substitute known-good module or attempt reprogramming if circuits test good
Estimated Repair Cost
$400 - $2,500
Parts + labor, varies by vehicle and location
The secondary image processing module has lost communication with the vehicle network. This backup or secondary module may handle additional camera inputs or redundant processing for safety systems.
The most common cause of U023B (Lost Communication With Image Processing Module "B") is: Failed image processing module B
Typical repair costs for U023B range from $400 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Redundant camera-based safety systems may be compromised. Primary systems may continue functioning but without backup redundancy.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U023B to identify the root cause.
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Quick Info
Category
Network
System
Advanced Driver Assistance Systems (ADAS)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
