U023C: How to Diagnose & Fix — Lost Communication With Image Processing Module "C"
2 vehicles · 2 makes
How to diagnose and fix U023C: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Cadillac Escalade ESV · 2021–2021
GM 21-NA-209 covers a bounded 2021 Escalade ESV condition with RPO UXP: a black radio screen showing a triangle and camera-slash symbol with current or recent U023C and B1A62-86. It does not establish general OLED hardware, flicker or infotainment-module failure.
Common Symptoms
- Black radio screen
- Triangle and camera-slash symbol on the display
How to Fix
Confirm the exact display pattern, RPO and DTCs. The GM procedure removes VPM fuse F28 for one minute, reinstalls it and has the dealer reprogram the K157 Video Processing Module. Do not replace the OLED display from this card.
Sources for this issue (1)
Chevrolet Silverado 1500 · 2022–2025
Owners report the camera display failing: a black screen with a red or error camera icon when shifting to reverse, sometimes with every camera view black when selected from the menu. In the linked threads the cameras came back on their own after a few seconds or a few hours. The owner reports come from 2022 Silverado 1500 Trail Boss trucks (one with the 13-inch screen of the 2022 refresh). GM's reset instructions PIC6566C describe the same black reverse-camera screen on 2024–2026 Silverado LD and many other GM models.
Common Symptoms
- Black screen with a camera error icon when shifting to reverse
- Every camera view is black when selected from the menu
- Cameras come back on their own after a few seconds or a few hours
How to Fix
Have the dealer check for current DTCs and software. GM's PIC6566C describes the black screen with a triangle and crossed-out camera on startup in reverse, lists DTCs such as U023C, B1596 and B1A62, attributes it to software anomalies and directs a radio or image/video processing module reset, replacing the video processing module on a repeat visit. A technician must confirm the cause on your truck.
Sources for this issue (3)
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U023C code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U023C mean?
U023C stands for "Lost Communication With Image Processing Module "C"." A generic (SAE U0xxx block) network/communication code: the module reporting U023C has stopped receiving expected messages from Image Processing Module C (IPM-C/IPA-C), one of the camera/vision processing controllers used by driver-assistance features. The definition is standardized, though which physical camera module is designated "C" varies by vehicle. Camera-based features (lane keeping, forward collision warning, automatic emergency braking, surround/parking views) are typically disabled while it is active. It reports a loss of communication, not proof the camera itself has failed — other bus or battery/ignition codes should be diagnosed first, since diagnosing U023C ahead of them is a common misdiagnosis.
What are the most common causes of U023C?
The most common causes of U023C are: Blown fuse or loss of power/ground to the image processing module, Damaged, corroded, or loose connector at the camera/image processing module, Open, short, or high resistance in the CAN bus wiring to the module, Failed image processing module (internal fault), Missing programming/calibration after module replacement or a windshield/camera swap — a replacement module must be programmed and calibrated to the vehicle, Low system voltage or a weak battery causing modules to drop off the bus. The specific cause varies by vehicle.
How much does it cost to fix U023C?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by U023C?
Au7o has documented U023C across 2 vehicle models from 2 manufacturers: Cadillac, Chevrolet.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.