Network, generic

U023C Lost Communication With Image Processing Module C

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U023C covers image processing module C, which GM uses for the video processing module (VPM) of its surround vision system. Bulletin 21-NA-209 (2021 Cadillac Escalade and Escalade ESV with RPO UXP) describes a black radio screen showing a triangle and a struck-through camera, with U023C and B1A62 current in the VPM K157; VPM software is the cause, and the repair is pulling fuse F28 for a minute, then reprogramming the VPM. GM's 2025 OBD summary 25OBDG04B lets EOCM3 set U023C when the surround vision data or the auxiliary camera status messages are absent for more than 0.25 s; the EOCM then disables adaptive cruise, and as a Special Type C code it leaves the MIL off. U053D covers invalid data from C.

Likely causes

Video processing module software (GM 21-NA-209)
Fuse or supply to the video processing module
Camera or bus wiring to the module damaged

Symptoms

  • Black display with crossed-out camera symbol
  • Surround view cameras unavailable
  • Adaptive cruise control disabled

Repair estimate

DifficultyHardWorkshop job
Parts and labour€0–1,500
Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

image module ccan bus

Related codes

U023AU023BU053D

References: static.nhtsa.gov, gsi.ext.gm.com.