B0126 code meaning
Driver Monitoring Camera
What B0126 means
B0126 belongs to the driver monitoring camera, an infrared camera aimed at the driver that tracks gaze and head position for hands-free and attention functions. GM uses the code: preliminary information PIC6556 (versions B to H, 2024–2025) for Super Cruise models from Cadillac Lyriq to Silverado EV lists B0126 symptom 82, stored by the module that processes camera images and often paired with B1DD0; the steps are a 30-minute disconnect, a check of the LVDS cable and finally a new camera. PIT6229 reports Super Cruise dropping out because software wrongly judged the driver's gaze to be off the road. In the EU, Delegated Regulation 2023/2590 requires distraction warnings above 20 km/h and a failure warning when the sensor is faulty or blocked. Hands-free driving is unavailable while the fault is active.
B0126 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0126
- Hands-free assistance such as Super Cruise unavailable or disengaging
- Driver attention or distraction warning inactive, failure message shown
Common causes of B0126
- Most likelyDriver monitoring camera internally defective
- PossibleLVDS cable to the image processing module damaged or poorly connected
- Less likelySoftware fault, or camera view blocked by objects or mounting problems
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Driver monitoring cameraDriver monitoring moduleCamera wiring
What each part of B0126 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 26 | The exact fault in that area. |
What to do next
- Note B0126 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 B0126
What does B0126 mean?
B0126 means "Driver Monitoring Camera". B0126 belongs to the driver monitoring camera, an infrared camera aimed at the driver that tracks gaze and head position for hands-free and attention functions. It is a generic code, so it means the same on every make.
Is it safe to drive with B0126?
B0126 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0126 fail an emissions test?
B0126 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 B0126 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will B0126 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.