U023B code meaning
Lost Communication With Image Processing Module B
What U023B means
U023B points to image processing module B. GM uses it on its newer Super Cruise vehicles: PI PIC6607 (2026 Cadillac LYRIQ and VISTIQ) lists U023B SYM00 as a history entry next to U3000, U1624, U0140 and U053C and states that these do not explain a Super Cruise unavailable message, so the image processing module must not be replaced for them; the real fault is found with GM's Super Cruise diagnosis. Ford names its 360 degree camera computer IPMB, for example on the 2020-2021 Explorer, Aviator and Corsair (SSM 49980, blue screen, reflash and camera alignment), so on Ford a U023B concerns that unit. Only a current code with a matching symptom needs wiring and supply checks. U053C covers invalid data from B; no MIL.
U023B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U023B
- Super Cruise or camera based assistance unavailable
- Surround view camera image blank
Common causes of U023B
- Most likelyHistory entry without effect (GM PIC6607)
- PossibleImage processing module software outdated
- Less likelyPower, ground or bus wiring to module B interrupted
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Image module bCAN bus
What each part of U023B means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3B | The exact fault in that area. |
What to do next
- Note U023B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U023B
What does U023B mean?
U023B means "Lost Communication With Image Processing Module B". U023B points to image processing module B. It is a generic code, so it means the same on every make.
Is it safe to drive with U023B?
U023B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U023B fail an emissions test?
U023B is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U023B to fix?
Difficulty: hard. A typical repair takes 0.3 to 3 hours of work. This is a job for a workshop.
Will U023B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.