B1019 on Cadillac
SDM System Configuration Error
B1019 on Cadillac vehicles indicates sdm system configuration error. Au7o has documented this code across 1 Cadillac model — most commonly on XTS. 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 Cadillac range from $150 to $600, 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 Cadillac by Model
Cadillac XTS(1 issue)
- HID Xenon Headlight Ballast Failure & Housing Moisture2013-2019
XTS HID/Xenon headlamps suffer ballast (HID control unit) failures and headlight-housing condensation that cause intermittent or total loss of a low beam. Owners report flickering, a headlamp that cuts out then comes back, or a dead side after a new bulb. Moisture entering the housing is a frequent root cause — water reaching the ballast causes rapid failure — and corrosion in the headlight wiring/ground (often shared with the upper LED DRL) can take out both the ballast and DRL together.
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View B1019 across all makes →Frequently Asked Questions
What does B1019 mean on Cadillac?▼
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 Cadillac specifically, this code is documented across 1 model.
What causes B1019 on Cadillac vehicles?▼
Common causes on Cadillac: 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 Cadillac?▼
Repair costs on Cadillac range from $150 to $600, depending on the specific model and root cause.
Which Cadillac models have B1019 documented?▼
Au7o has documented B1019 on 1 Cadillac model: XTS.