System: Body (B-Code)
SAE Standard (Generic)
Family: ADAS Camera Module Circuit
Code B0126: Driver Monitoring Camera
Diagnostic & Technical Explanation
Code B0126 (Driver Monitoring Camera) sets when the module cannot establish power or communication with the night vision camera, its dedicated control module, or the driver monitoring camera used for attention/drowsiness detection. Unlike a forward-facing ADAS camera bolted to the windshield, these units are often mounted in the instrument cluster hood or A-pillar and share a dedicated power and data circuit with their control module, so a fault here typically traces to a connector at that mounting location, a blown fuse on a shared feed, or a failed camera imaging element. Losing this camera disables its specific driver-assist or monitoring feature but does not affect core ADAS functions fed by the primary forward camera.
First-listed procedure
Rank #1
Inspect camera module connector and fuse
Easy DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 3 procedure(s) are in the licensed dataset. Ordering context.
Full family: ADAS Camera Module Circuit
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)