U056B code meaning
Invalid Data Received From Image Processing Sensor F
What U056B means
At GM, the partner of U056B – U026A – belongs to the front camera module B174W. A 2023 GM note for 2022–2023 Cadillac XT5 and XT6, Chevrolet Equinox and GMC Acadia and Terrain blames U026A plus the front-camera warning on terminals in that camera that were pushed back or absent, which then has to be replaced. On 2016 Escalade, Malibu, Silverado, Suburban, Tahoe, Sierra and Yukon, U026A could appear in the cluster or body module because of camera software, and GM advised against replacing parts. Sensor F is thus a forward camera on these GM platforms, whereas the 2020 CT4 and CT5 file their windshield camera under letter A. U056B itself is in no public bulletin; lane and collision functions are likely off while it is set. No MIL.
U056B at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U056B
- Service Front Camera message
- Lane keeping, lane departure or forward collision alert unavailable
Common causes of U056B
- Most likelyPushed-in or missing terminals in the front camera connector (GM 2022–2023)
- PossibleFront camera software fault, fixed by reprogramming
- Less likelyFront camera module internally faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Image processing sensor f
What each part of U056B means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6B | The exact fault in that area. |
What to do next
- Note U056B 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 U056B
What does U056B mean?
U056B means "Invalid Data Received From Image Processing Sensor F". At GM, the partner of U056B – U026A – belongs to the front camera module B174W. It is a generic code, so it means the same on every make.
Is it safe to drive with U056B?
U056B does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U056B fail an emissions test?
U056B 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 U056B to fix?
Difficulty: hard. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will U056B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.