B1019 on Nissan
SDM System Configuration Error
B1019 on Nissan vehicles indicates sdm system configuration error. Au7o has documented this code across 1 Nissan model — most commonly on Leaf. General Motors definition. At every ignition cycle the Sensing and Diagnostic Module (SDM, the airbag control module) compares the restraint configuration stored in its memory against the restraint hardware it actually sees on the SRS circuits — deployment loops, impact sensors, pretensioners and seat/occupant hardware. B1019 sets when the detected configuration does not match the programmed configuration, and the SDM disables the entire restraint system so that nothing can deploy incorrectly. Note: this GM definition does not apply to Nissan, where B1019 is used for the Occupant Classification System (OCS) control unit / sensor mat and its link to the airbag diagnosis sensor unit; scope the code to the correct manufacturer before acting on it. Typical repair costs on Nissan range from $500 to $5,000, depending on the specific model and root cause.
Common Causes of B1019
- •Airbag control module (SDM) replaced with a unit not programmed/configured to the vehicle's build
- •A restraint component (seat-mounted airbag, pretensioner, impact sensor, occupant sensing hardware) unplugged, missing or substituted with the wrong part
- •Damaged or corroded SRS connector under a seat, or a yellow SRS connector not fully latched after seat/interior work
- •Wrong-VIN or incorrect calibration loaded into the SDM after a repair
- •Internal SDM fault
B1019 on Nissan by Model
Nissan Leaf(1 issue)
- Passenger Airbag Occupant Classification (OCS) Sensor Failure2011-2012
The passenger seat's Occupant Classification System (OCS) sensor mat can fail, causing the 'Passenger Airbag OFF' light to stay illuminated even with an adult in the seat, deactivating the passenger airbag. NHTSA opened (and later closed) an investigation into 2011-2012 Leafs for this defect, and owners set a B1018 seat-sensor DTC. Nissan recalled 2013-2016 Leafs for a related airbag/OCS issue but excluded 2011-2012 because the system differs, leaving those owners to pay out of pocket. The costly part: the OCS mat is integrated into the seat, so the fix often requires replacing the entire passenger seat (owners report $3,000-$5,000).
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View B1019 across all makes →Frequently Asked Questions
What does B1019 mean on Nissan?▼
B1019 stands for "SDM System Configuration Error." General Motors definition. At every ignition cycle the Sensing and Diagnostic Module (SDM, the airbag control module) compares the restraint configuration stored in its memory against the restraint hardware it actually sees on the SRS circuits — deployment loops, impact sensors, pretensioners and seat/occupant hardware. B1019 sets when the detected configuration does not match the programmed configuration, and the SDM disables the entire restraint system so that nothing can deploy incorrectly. Note: this GM definition does not apply to Nissan, where B1019 is used for the Occupant Classification System (OCS) control unit / sensor mat and its link to the airbag diagnosis sensor unit; scope the code to the correct manufacturer before acting on it. On Nissan specifically, this code is documented across 1 model.
What causes B1019 on Nissan vehicles?▼
Common causes on Nissan: Airbag control module (SDM) replaced with a unit not programmed/configured to the vehicle's build, A restraint component (seat-mounted airbag, pretensioner, impact sensor, occupant sensing hardware) unplugged, missing or substituted with the wrong part, Damaged or corroded SRS connector under a seat, or a yellow SRS connector not fully latched after seat/interior work, Wrong-VIN or incorrect calibration loaded into the SDM after a repair, Internal SDM fault. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B1019 on a Nissan?▼
Repair costs on Nissan range from $500 to $5,000, depending on the specific model and root cause.
Which Nissan models have B1019 documented?▼
Au7o has documented B1019 on 1 Nissan model: Leaf.